Abstract

In an embodiment, a communication circuit includes a frequency-shifting circuit coupled to a signal path, which is configured to carry, during a first period, an information signal having a first frequency. The frequency-shifting circuit is configured to receive a control signal, to shift the first frequency of the information signal by a second frequency in response to the control signal having a first control value, and to shift a third frequency of an interference signal on the signal path during a second period by a fourth frequency in response to the control signal having a second control value. For example, such a communication signal can be configured to shift the frequencies of an interference signal generated by the signal path out of the passband of an adjacent signal path to reduce the interference superimposed on a signal carried by the adjacent signal path.

IPC Classes  ?

• H04B 1/525 - Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver

Abstract

Techniques are provided to more accurately determine reflected power, reflection coefficient, and/or voltage standing wave to permit prompt protection of components such as power amplifiers and notify communication system operators. This is accomplished by more accurately determining an amplitude and phase of an output reflected signal at an output port of a bidirectional coupler as a function of the following: an amplitude and a phase of a coupled forward signal coupled into a forward coupled port of the bidirectional coupler; an amplitude and a phase of a coupled reverse signal coupled into a reverse coupled port of the bidirectional coupler; an electrical transmission parameter from an input port of the bidirectional coupler to the forward coupled port; an electrical transmission parameter from the input port to the reverse coupled port; and an electrical transmission parameter from an output port of the bidirectional coupler to the reverse coupled port.

IPC Classes  ?

• H03F 1/56 - Modifications of input or output impedances, not otherwise provided for
• G01R 27/06 - Measuring reflection coefficientsMeasuring standing-wave ratio
• G01R 27/28 - Measuring attenuation, gain, phase shift, or derived characteristics of electric four-pole networks, i.e. two-port networksMeasuring transient response
• H01P 5/18 - Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
• H03F 3/21 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
• H03M 1/12 - Analogue/digital converters
• H04B 1/04 - Circuits

Abstract

In an embodiment, a communication circuit includes a frequency-shifting circuit coupled to a signal path, which is configured to carry, during a first period, an information signal having a first frequency. The frequency-shifting circuit is configured to receive a control signal, to shift the first frequency of the information signal by a second frequency in response to the control signal having a first control value, and to shift a third frequency of an interference signal on the signal path during a second period by a fourth frequency in response to the control signal having a second control value. For example, such a communication signal can be configured to shift the frequencies of an interference signal generated by the signal path out of the passband of an adjacent signal path to reduce the interference superimposed on a signal carried by the adjacent signal path.

IPC Classes  ?

• H04B 1/525 - Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
• H04W 88/08 - Access point devices

Abstract

A sequenced transmit muting wideband power amplifier is provided that includes at least one pre-driver stage having at least a first pre-driver and a second pre-driver. A mute switch selectively establishes a communication path between the first and second pre-drivers or couples the second pre-driver to a termination resistor. A pre-driver switch selectively activates/deactivates the first and second pre-drivers. A driver stage is in communication with the pre-driver stage and includes a first driver. A final amplifier stage is in communication with the driver stage and includes at least one second driver. At least one S-NBS switch is configured to selectively activate/deactivate the first driver and second driver. A controller is configured to activate the at least one pre-driver switch, the mute switch, the at least one S-NBS switch to selectively place the amplifier in one of a transmit mode and a mute mode.

IPC Classes  ?

• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H03F 1/02 - Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
• H03F 3/24 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
• H04J 3/08 - Intermediate station arrangements, e.g. for branching, for tapping-off

Abstract

In an example, a configuration circuit includes a connector and a controller communicatively coupled to the connector via one or more signal lines. The configuration circuit further includes a microcontroller communicatively coupled to the controller via an interface. The configuration circuit further includes a connection detection circuit communicatively coupled to the microcontroller and the one or more signal lines. The connection detection circuit is configured to determine whether communication traffic between the connector and the controller on the one or more signal lines is detected, and output an interrupt signal to the microcontroller in response to detecting communication traffic between the connector and the controller on the one or more signal lines. The microcontroller is configured to instruct the controller to wake from a low-power sleep mode in response to receiving the interrupt signal from the connection detection circuit.

IPC Classes  ?

• H04W 52/02 - Power saving arrangements
• H04W 16/26 - Cell enhancers, e.g. for tunnels or building shadow

Abstract

In one example, a system includes a central unit and a plurality of radiating points communicatively coupled to the central unit and located remotely from the central unit. Each respective radiating point includes a detector configured to evaluate uplink signals received from a coverage area of the respective radiating point. The detector is further configured to determine which services of a plurality of services supported by the system are needed and which services of the plurality of services supported by the system are not needed based on the evaluation of the uplink signals. The detector is further configured to send a request, to the central unit, to activate a service determined to be needed.

IPC Classes  ?

• H04B 7/024 - Co-operative use of antennas at several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• H04W 88/08 - Access point devices

Abstract

In one example, a system includes a central unit and a plurality of radiating points communicatively coupled to the central unit and located remotely from the central unit. Each respective radiating point includes a detector configured to evaluate uplink signals received from a coverage area of the respective radiating point. The detector is further configured to determine which services of a plurality of services supported by the system are needed and which services of the plurality of services supported by the system are not needed based on the evaluation of the uplink signals. The detector is further configured to send a request, to the central unit, to activate a service determined to be needed.

IPC Classes  ?

• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04B 17/318 - Received signal strength
• H04B 7/0426 - Power distribution
• H04W 48/16 - DiscoveringProcessing access restriction or access information
• H04W 72/04 - Wireless resource allocation
• H04W 88/08 - Access point devices
• H04W 88/12 - Access point controller devices

Abstract

Uplink leveling systems and methods for a distribution antenna are provided. An uplink leveling system includes at least one communication path between a base station point of interface and a remote antenna unit. A broadband measurement detector is communicatively coupled to measure signal power in the at least one communication path at the base station point of interface. A signal measurement receiver is communicatively coupled to measure signal power in the at least one communication path. A test signal generator is configured to generate a test signal in the at least one communication path in an uplink. At least one controller is configured to level the communication path in the uplink direction based at least in part on measurements by the broadband measurement detector and the signal measurement receiver in response to the generated test signal by the test signal generator.

IPC Classes  ?

• H04W 72/04 - Wireless resource allocation
• H04W 24/10 - Scheduling measurement reports
• H04W 52/14 - Separate analysis of uplink or downlink
• H04L 1/00 - Arrangements for detecting or preventing errors in the information received
• H04B 7/022 - Site diversityMacro-diversity
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04W 88/08 - Access point devices
• H04B 17/21 - MonitoringTesting of receivers for calibrationMonitoringTesting of receivers for correcting measurements

Abstract

In one embodiment a system comprises a master unit configured to receive a base station downlink radio frequency signal and transmit a base station uplink radio frequency signal; and a plurality of remote antenna units each communicatively coupled to the master unit using at least one cable, the remote antenna units each configured to radiate a remote downlink radio frequency signal from at least one antenna and to receive a remote uplink radio frequency signal from the at least one antenna. The master unit comprises a channel selective uplink muting circuit. The master unit receives and monitors uplink transport signals from the remote uplink radio frequency signal to identify one or more channels within the uplink transport signals that are not carrying uplink communications traffic; wherein the channel selective uplink muting circuit selectively mutes channels of the uplink transport signals that are not carrying uplink communications traffic.

IPC Classes  ?

• H04B 1/40 - Circuits
• H04B 7/026 - Co-operative diversity, e.g. using fixed or mobile stations as relays

Abstract

In one embodiment a system comprises a master unit configured to receive a base station downlink radio frequency signal and transmit a base station uplink radio frequency signal; and a plurality of remote antenna units each communicatively coupled to the master unit using at least one cable, the remote antenna units each configured to radiate a remote downlink radio frequency signal from at least one antenna and to receive a remote uplink radio frequency signal from the at least one antenna. The master unit comprises a channel selective uplink muting circuit. The master unit receives and monitors uplink transport signals from the remote uplink radio frequency signal to identify one or more channels within the uplink transport signals that are not carrying uplink communications traffic; wherein the channel selective uplink muting circuit selectively mutes channels of the uplink transport signals that are not carrying uplink communications traffic.

IPC Classes  ?

• H04W 88/08 - Access point devices
• H04B 1/10 - Means associated with receiver for limiting or suppressing noise or interference
• H04B 7/022 - Site diversityMacro-diversity
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• H04W 24/02 - Arrangements for optimising operational condition

Abstract

A local roaming cell system for a mobile communication coverage area is disclosed. The system comprises: a RF head end that communicates with a plurality of base stations via a plurality of wireless RF communication links, wherein the plurality of base stations are outside of the coverage area; a conversion and link aggregation circuit that demodulates and processes downlink base station signals associated with at least two of the plurality of base stations by link aggregation to obtain a downlink signal comprising communications data extracted from the downlink base station signals; a roaming base station that modulates portions of the downlink signal to provide a local communication cell within in the coverage area to a plurality of user terminals. A first of the user terminals communicates via the roaming base station with a different one of the plurality of base stations than a second of user terminals.

IPC Classes  ?

• H04B 7/155 - Ground-based stations
• H04W 72/04 - Wireless resource allocation
• H04W 16/14 - Spectrum sharing arrangements
• H04W 84/00 - Network topologies
• H04W 84/04 - Large scale networksDeep hierarchical networks

Abstract

In one embodiment, a distributed antenna system comprises at least one master unit; at least one remote antenna unit coupled to the master unit and comprising a power amplifier to radiate a remote downlink radio frequency signal, the remote antenna unit further configured to receive a remote uplink radio frequency signal from at least one antenna, the remote downlink radio frequency signal comprises first and second downlink frequency bands and wherein the remote uplink radio frequency signal comprises first and second uplink frequency bands; a band suppression module comprising: a controller; an uplink band suppression element configured to apply an attenuation to suppress the first uplink frequency band in response to a signal from the controller; and a downlink band suppression element configured to apply an attenuation to suppress the first downlink frequency band in response to the signal from the band suppression controller.

IPC Classes  ?

• H04L 5/00 - Arrangements affording multiple use of the transmission path
• H04B 7/022 - Site diversityMacro-diversity
• H04W 28/08 - Load balancing or load distribution
• H04W 28/18 - Negotiating wireless communication parameters
• H04W 72/04 - Wireless resource allocation
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04W 88/08 - Access point devices

Abstract

A technique to characterize moisture in a dielectric layer of a printed circuit board is provided. A method comprises applying a test signal to test circuitry comprising a test capacitor that is formed with the dielectric layer of the printed circuit board; measuring at least one characteristic of a least one of signal transmission and signal reflection from the test circuitry; and determining, from the at least one measured characteristic, at least one parameter value indicative of moisture content in the dielectric layer.

IPC Classes  ?

• G01N 27/22 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
• G01N 5/02 - Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
• H05K 1/02 - Printed circuits Details

Abstract

A technique to characterize moisture in a dielectric layer of a printed circuit board is provided. A method comprises applying a test signal to test circuitry comprising a test capacitor that is formed with the dielectric layer of the printed circuit board; measuring at least one characteristic of a least one of signal transmission and signal reflection from the test circuitry; and determining, from the at least one measured characteristic, at least one parameter value indicative of moisture content in the dielectric layer.

IPC Classes  ?

• H05K 1/02 - Printed circuits Details
• H05K 1/16 - Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor

Abstract

A method of tuning a production module using a reference module with virtual gain correction is provided. The method includes selecting a counterpart reference module created for a select application. The production module is commutatively coupled to the selected counterpart reference module to generate a production module pair. A production module gain curve for the production module pair is measured for each frequency band to be used by the production module. The production module is tuned based at least in part on offset gain values at select number of frequency observation points for each frequency band associated with the counterpart reference module and gain values at the select number of frequency observation points of the measured production module gain curve for each frequency band.

IPC Classes  ?

• G01M 11/00 - Testing of optical apparatusTesting structures by optical methods not otherwise provided for
• H04B 10/079 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• H04B 10/43 - Transceivers using a single component as both light source and receiver, e.g. using a photoemitter as a photoreceiver
• H04W 88/08 - Access point devices

Abstract

A modular filter system includes a front panel, a back panel, and a multiband combiner coupled to the front panel, the combiner including an antenna connector and filter connectors. The modular filter system further includes filter modules separate from the combiner, each filter module including first and second connectors to pass respective frequency bands, and a combiner connector to pass the frequency bands. Each filter module is configured to duplex, combine, or split first signals in the first frequency band and second signals in the second frequency band. The combiner connector of each filter module is coupled to a respective filter connector using a respective cable. The modular filter system further includes a fixing system comprising bars and plates, the bars coupled to the front and back panels using fasteners, wherein the bars and plates are configured to secure the filter modules between the combiner and the back panel.

IPC Classes  ?

• H01P 1/213 - Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
• H01P 11/00 - Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type

Abstract

A modular filter system includes a front panel, a back panel, and a multiband combiner coupled to the front panel, the combiner including an antenna connector and filter connectors. The modular filter system further includes filter modules separate from the combiner, each filter module including first and second connectors to pass respective frequency bands, and a combiner connector to pass the frequency bands. Each filter module is configured to duplex, combine, or split first signals in the first frequency band and second signals in the second frequency band. The combiner connector of each filter module is coupled to a respective filter connector using a respective cable. The modular filter system further includes a fixing system comprising bars and plates, the bars coupled to the front and back panels using fasteners, wherein the bars and plates are configured to secure the filter modules between the combiner and the back panel.

IPC Classes  ?

• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04B 1/40 - Circuits
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex

Abstract

A method of tuning a production module using a reference module with virtual gain correction is provided. The method includes selecting a counterpart reference module created for a select application. The production module is commutatively coupled to the selected counterpart reference module to generate a production module pair. A production module gain curve for the production module pair is measured for each frequency band to be used by the production module. The production module is tuned based at least in part on offset gain values at select number of frequency observation points for each frequency band associated with the counterpart reference module and gain values at the select number of frequency observation points of the measured production module gain curve for each frequency band.

IPC Classes  ?

• H04W 88/08 - Access point devices
• H03M 1/10 - Calibration or testing
• H01Q 21/28 - Combinations of substantially independent non-interacting antenna units or systems
• H04W 72/04 - Wireless resource allocation
• G01R 27/28 - Measuring attenuation, gain, phase shift, or derived characteristics of electric four-pole networks, i.e. two-port networksMeasuring transient response
• G01R 17/04 - Arrangements in which the value to be measured is automatically compared with a reference value in which the reference value is continuously or periodically swept over the range of values to be measured
• G01R 27/30 - Measuring attenuation, gain, phase shift, or derived characteristics of electric four-pole networks, i.e. two-port networksMeasuring transient response with provision for recording characteristics, e.g. by plotting Nyquist diagram

Abstract

A telecommunications system can include analog-to-digital converters in an uplink communication path or a downlink communication path. The analog-to-digital converters can have a high dynamic range and bandwidth to obviate a need for down-conversion of signals using an analog mixer. The uplink communication path and the downlink communication path can be coupled to an antenna using a non-duplexer coupling device. Uplink signals traversing the uplink communication path can be isolated from downlink signals independent of using a duplexer.

IPC Classes  ?

• H04B 15/02 - Reducing interference from electric apparatus by means located at or near the interfering apparatus
• H04B 1/525 - Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
• H04W 88/08 - Access point devices
• H04B 1/48 - Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04B 1/52 - Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex

Abstract

A telecommunications system may include a distortion cancellation subsystem for use with a circulator device coupling an antenna to a transmit path and a receive path. The distortion cancellation subsystem may include a correction circuit and a cancellation circuit. In some aspects, the correction circuit may include a processing device or adaptive filter to correct imperfections in transmit signal samples generated by directional couplers. The correction circuit may also include a summing device to remove receive signal components from the transmit signal samples. The cancellation circuit may receive the output signal of the correction circuit via an adaptive filter. The output of the adaptive filter may be summed with a receive signal to minimize distortion of the receive signal.

IPC Classes  ?

• H04B 1/48 - Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
• H04B 1/52 - Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa

Abstract

In one embodiment, a distributed antenna system comprises: at least one master unit; at least one remote antenna unit communicatively coupled via a switch to the master unit by a primary cable and a secondary cable both coupled to the switch, the remote antenna unit comprising a compensating link check module that outputs a control signal to the switch, wherein the switch selects between the primary and secondary cable in response to the control signal; wherein the compensating link check module controls the switch to momentarily select the secondary cable to perform a link check during which the remote unit measures a quality metric of a downlink signal received via the secondary cable; and upon initiation of the link check, the compensating link check module adjusts an attenuation of the downlink signal received on the secondary cable by loading calibration settings for the secondary cable into a compensation attenuator.

IPC Classes  ?

• H04B 10/25 - Arrangements specific to fibre transmission
• H04B 10/079 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• H04Q 11/00 - Selecting arrangements for multiplex systems
• H04W 24/08 - Testing using real traffic
• H04W 88/08 - Access point devices
• H04B 10/032 - Arrangements for fault recovery using working and protection systems
• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• H04Q 11/06 - Time-space-time switching
• G01R 31/58 - Testing of lines, cables or conductors
• G01M 11/00 - Testing of optical apparatusTesting structures by optical methods not otherwise provided for
• H04B 17/00 - MonitoringTesting

Abstract

Techniques are provided to more accurately determine reflected power, reflection coefficient, and/or voltage standing wave to permit prompt protection of components such as power amplifiers and notify communication system operators. This is accomplished by more accurately determining an amplitude and phase of an output reflected signal at an output port of a bidirectional coupler as a function of the following: an amplitude and a phase of a coupled forward signal coupled into a forward coupled port of the bidirectional coupler; an amplitude and a phase of a coupled reverse signal coupled into a reverse coupled port of the bidirectional coupler; an electrical transmission parameter from an input port of the bidirectional coupler to the forward coupled port; an electrical transmission parameter from the input port to the reverse coupled port; and an electrical transmission parameter from an output port of the bidirectional coupler to the reverse coupled port.

IPC Classes  ?

• H03F 1/52 - Circuit arrangements for protecting such amplifiers
• H04B 17/10 - MonitoringTesting of transmitters
• H04B 1/04 - Circuits

Abstract

Techniques are provided to more accurately determine reflected power, reflection coefficient, and/or voltage standing wave to permit prompt protection of components such as power amplifiers and notify communication system operators. This is accomplished by more accurately determining an amplitude and phase of an output reflected signal at an output port of a bidirectional coupler as a function of the following: an amplitude and a phase of a coupled forward signal coupled into a forward coupled port of the bidirectional coupler; an amplitude and a phase of a coupled reverse signal coupled into a reverse coupled port of the bidirectional coupler; an electrical transmission parameter from an input port of the bidirectional coupler to the forward coupled port; an electrical transmission parameter from the input port to the reverse coupled port; and an electrical transmission parameter from an output port of the bidirectional coupler to the reverse coupled port.

IPC Classes  ?

• H03F 1/56 - Modifications of input or output impedances, not otherwise provided for
• G01R 27/06 - Measuring reflection coefficientsMeasuring standing-wave ratio
• G01R 27/28 - Measuring attenuation, gain, phase shift, or derived characteristics of electric four-pole networks, i.e. two-port networksMeasuring transient response
• H01P 5/18 - Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
• H03F 3/21 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
• H03M 1/12 - Analogue/digital converters
• H04B 1/04 - Circuits

Abstract

A sequenced transmit muting wideband power amplifier is provided that includes at least one pre-driver stage having at least a first pre-driver and a second pre-driver. A mute switch selectively establishes a communication path between the first and second pre-drivers or couples the second pre-driver to a termination resistor. A pre-driver switch selectively activates/deactivates the first and second pre-drivers. A driver stage is in communication with the pre-driver stage and includes a first driver. A final amplifier stage is in communication with the driver stage and includes at least one second driver. At least one S-NBS switch is configured to selectively activate/deactivate the first driver and second driver. A controller is configured to activate the at least one pre-driver switch, the mute switch, the at least one S-NBS switch to selectively place the amplifier in one of a transmit mode and a mute mode.

IPC Classes  ?

• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H03F 1/02 - Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
• H03F 3/24 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
• H04J 3/08 - Intermediate station arrangements, e.g. for branching, for tapping-off

Abstract

A sequenced transmit muting wideband power amplifier is provided that includes at least one pre-driver stage having at least a first pre-driver and a second pre-driver. A mute switch selectively establishes a communication path between the first and second pre-drivers or couples the second pre-driver to a termination resistor. A pre-driver switch selectively activates/deactivates the first and second pre-drivers. A driver stage is in communication with the pre-driver stage and includes a first driver. A final amplifier stage is in communication with the driver stage and includes at least one second driver. At least one S-NBS switch is configured to selectively activate/deactivate the first driver and second driver. A controller is configured to activate the at least one pre-driver switch, the mute switch, the at least one S-NBS switch to selectively place the amplifier in one of a transmit mode and a mute mode.

IPC Classes  ?

• H03F 3/217 - Class D power amplifiersSwitching amplifiers
• H03K 17/16 - Modifications for eliminating interference voltages or currents

Abstract

In an example, a node of a telecommunications system includes a first section having one or more passive components; a second section including one or more power amplifier modules and a power supply, wherein the second section is coupled to the first section using fasteners; a distribution unit including a plate and a circuit board, wherein the second section is coupled to the distribution unit using fasteners; a cooling section; a first plurality of heat pipes extending from the one or more power amplifier modules to the cooling section; a second plurality of heat pipes extending from the first section into the second section; and a housing enclosing the first section and the second section.

IPC Classes  ?

• H04B 1/03 - Constructional details, e.g. casings, housings
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• F28D 15/02 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes
• H03F 3/20 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers

Abstract

In an example, a node of a telecommunications system includes a first section having one or more passive components; a second section including one or more power amplifier modules and a power supply, wherein the second section is coupled to the first section using fasteners; a distribution unit including a plate and a circuit board, wherein the second section is coupled to the distribution unit using fasteners; a cooling section; a first plurality of heat pipes extending from the one or more power amplifier modules to the cooling section; a second plurality of heat pipes extending from the first section into the second section; and a housing enclosing the first section and the second section.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H04B 1/036 - Cooling arrangements

Abstract

A method (600) comprises: measuring (660) reflected and forward power at a power amplifier output; determining (664) if the reflected power equals to or exceeds a first level; if the reflected power is equal to or exceeds the first level, then reduce (668) a power level of a power amplifier input signal; determining (670) if a standing wave ratio at the power amplifier output equals or exceeds a second level; if the standing wave ratio at the power amplifier output equals or exceeds the second level, then reducing (672) the power level and/ or sending an alarm; determining (674) if the power amplifier output power equals or exceeds a third level; and if the power output from the power amplifier equals or exceeds the third level, then reducing (676) the power level until such power level is less than or equal to the third level and/or sending an alarm.

IPC Classes  ?

• H03F 1/52 - Circuit arrangements for protecting such amplifiers
• H03F 3/189 - High-frequency amplifiers, e.g. radio frequency amplifiers
• H03F 3/24 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
• H03G 3/30 - Automatic control in amplifiers having semiconductor devices
• G01R 27/06 - Measuring reflection coefficientsMeasuring standing-wave ratio
• H04B 1/04 - Circuits

Abstract

Systems and methods for unified facility communications systems with device location are provided. One system embodiment comprises: a master unit and a plurality of remote antenna units defining a DAS. The master unit communicates with a base station to receive a base station downlink RF signal and to transmit a base station uplink RF signal. The remote antenna units radiate a remote downlink RF signal into a coverage area and receive a remote uplink RF signal from the coverage area. The master unit comprises uplink and downlink circuitry to transport user device communications, and a facility supervisory module to process facility device traffic associated with wireless facility assets in the coverage area. Facility device traffic is transported via the remote antenna units. Within the master unit, user device communications is routed via the uplink and downlink circuitry and facility device traffic is routed via the facility supervisory module.

IPC Classes  ?

• H04W 72/04 - Wireless resource allocation
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04W 64/00 - Locating users or terminals for network management purposes, e.g. mobility management
• H04W 72/12 - Wireless traffic scheduling

Abstract

Systems and methods for unified facility communications systems with device location are provided. One system embodiment comprises: a master unit and a plurality of remote antenna units defining a DAS. The master unit communicates with a base station to receive a base station downlink RF signal and to transmit a base station uplink RF signal. The remote antenna units radiate a remote downlink RF signal into a coverage area and receive a remote uplink RF signal from the coverage area. The master unit comprises uplink and downlink circuitry to transport user device communications, and a facility supervisory module to process facility device traffic associated with wireless facility assets in the coverage area. Facility device traffic is transported via the remote antenna units. Within the master unit, user device communications is routed via the uplink and downlink circuitry and facility device traffic is routed via the facility supervisory module.

IPC Classes  ?

• H04B 7/26 - Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
• H04W 88/08 - Access point devices
• H04B 7/024 - Co-operative use of antennas at several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• G08B 7/06 - Signalling systems according to more than one of groups Personal calling systems according to more than one of groups using electric transmission
• A62B 3/00 - Devices or single parts for facilitating escape from buildings or the like, e.g. protection shields, protection screensPortable devices for preventing smoke penetrating into distinct parts of buildings
• G01C 21/20 - Instruments for performing navigational calculations

Abstract

In one embodiment, a method for leveling and optimizing a distributed antenna system (DAS) includes determining a position of a test user equipment (UE); identifying one or more remote antenna units (RAUs) of a plurality of RAUs of the DAS in a vicinity of the test UE that contribute to downlink test signals received by the test UE at the position; transmitting downlink test signals from each RAU of the one or more RAUs to the test UE at the position; measuring a signal power of the downlink test signals transmitted from each RAU of the one or more RAUs received by the test UE at the position; and adjusting one or more components of the DAS until a target signal power of the downlink test signals from each RAU of the one or more RAUs for the position is received at the test UE.

IPC Classes  ?

• H04W 24/02 - Arrangements for optimising operational condition
• H04W 88/08 - Access point devices

Abstract

One embodiment is directed to a multiple input, multiple output (“MIMO”) telecommunications system comprising a plurality of signal paths. The system further comprises mixers located in the plurality of signal paths, the mixers being coupled to oscillators for producing a plurality of signals occupying non-overlapping frequency bands and representative of wireless signals. The system further comprises a summer coupled to the plurality of signal paths for summing the plurality of signals to form summed signals. The system further comprises a shared analog-to-digital converter for converting the summed signals to digital signals.

IPC Classes  ?

• H04B 7/04 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
• H04W 88/08 - Access point devices
• H04B 7/0413 - MIMO systems
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04B 1/26 - Circuits for superheterodyne receivers
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04L 25/02 - Baseband systems Details
• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks

Abstract

In one embodiment, a distributed antenna system comprises: a master unit configured to receive a base station downlink radio frequency signal and to transmit a base station uplink radio frequency signal; and at least one remote antenna unit that is communicatively coupled to the master unit using at least one cable, the remote antenna unit configured to radiate a remote downlink radio frequency signal and to receive a remote uplink radio frequency signal; wherein the master unit comprises: a controller; and a respective interface to couple the controller to a first operator control panel; wherein the at least one remote antenna unit comprises: a controller; and a respective interface to couple the controller to a second operator control panel; wherein the master unit controller and the remote unit controller synchronize at least some information between the first and second operator control panels over the at least one cable.

IPC Classes  ?

• H04J 14/00 - Optical multiplex systems
• H04Q 11/00 - Selecting arrangements for multiplex systems
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• H04W 56/00 - Synchronisation arrangements
• H04B 10/25 - Arrangements specific to fibre transmission
• H04W 16/28 - Cell structures using beam steering
• H04B 1/40 - Circuits
• H01Q 3/00 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
• H04W 88/08 - Access point devices
• H04B 7/024 - Co-operative use of antennas at several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems

Abstract

In one embodiment, a distributed antenna system comprises: at least one master unit; at least one remote antenna unit communicatively coupled via a switch to the master unit by a primary cable and a secondary cable both coupled to the switch, the remote antenna unit comprising a compensating link check module that outputs a control signal to the switch, wherein the switch selects between the primary and secondary cable in response to the control signal; wherein the compensating link check module controls the switch to momentarily select the secondary cable to perform a link check during which the remote unit measures a quality metric of a downlink signal received via the secondary cable; and upon initiation of the link check, the compensating link check module adjusts an attenuation of the downlink signal received on the secondary cable by loading calibration settings for the secondary cable into a compensation attenuator.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 10/079 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• H04Q 11/00 - Selecting arrangements for multiplex systems
• H04W 24/08 - Testing using real traffic
• H04W 88/08 - Access point devices
• H04B 10/032 - Arrangements for fault recovery using working and protection systems
• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• H04Q 11/06 - Time-space-time switching
• G01R 31/58 - Testing of lines, cables or conductors
• G01M 11/00 - Testing of optical apparatusTesting structures by optical methods not otherwise provided for

Abstract

Certain aspects are directed to a mounting assembly for mounting an antenna unit or other device. The mounting assembly includes at least one bracket and at least one retaining assembly. The bracket can be movably positioned at multiple orientation angles with respect to a surface. The bracket includes a latching edge that defines multiple recesses. Each of the recesses corresponds to one of the orientation angles. The retaining assembly is positioned adjacent to the bracket. The retaining assembly includes at least one protrusion that can engage one of the recesses to form a latching connection between the bracket and the retaining assembly. The latching connection can retain the bracket at an orientation angle corresponding to the engaged recess.

IPC Classes  ?

• H01Q 1/12 - SupportsMounting means
• E04G 3/00 - Scaffolds essentially supported by building constructions, e.g. adjustable in height

Abstract

A repeater with redundancy functions for a wireless communication system is provided. The repeater includes downlink repeater circuitry, uplink repeater circuitry, a detection function, at least one memory and a controller. The detection function is configured to detect conditions of communications between the base stations and the repeater. The at least one memory is used to store a primary configuration that sets out parameters for interfacing communications between the repeater and a primary base station of the base stations and at least one secondary configuration that sets out parameters for interfacing communications between the repeater and at least one secondary base station of the base stations and/or a secondary signal line of signal lines between the repeater and the primary base station. The controller is configured to implement the at least one secondary configuration to communicate with an associated secondary base station upon the detection function detecting abnormal communications between the repeater and the primary base station.

IPC Classes  ?

• H04B 7/155 - Ground-based stations

Abstract

A repeater with redundancy functions for a wireless communication system is provided. The repeater includes downlink repeater circuitry, uplink repeater circuitry, a detection function, at least one memory and a controller. The detection function is configured to detect conditions of communications between the base stations and the repeater. The at least one memory is used to store a primary configuration that sets out parameters for interfacing communications between the repeater and a primary base station of the base stations and at least one secondary configuration that sets out parameters for interfacing communications between the repeater and at least one secondary base station of the base stations and/or a secondary signal line of signal lines between the repeater and the primary base station. The controller is configured to implement the at least one secondary configuration to communicate with an associated secondary base station upon the detection function detecting abnormal communications between the repeater and the primary base station.

IPC Classes  ?

• H04B 7/15 - Active relay systems
• H04W 24/04 - Arrangements for maintaining operational condition
• H04W 76/15 - Setup of multiple wireless link connections
• H04B 7/155 - Ground-based stations
• H04W 88/08 - Access point devices

Abstract

Certain aspects are directed to a configuration sub-system for telecommunication systems. The configuration sub-system can include a test signal generator, a power measurement device, at least one additional power measurement device, and a controller. The test signal generator can be integrated into components of a telecommunication system. The test signal generator can provide a test signal to a signal path of the telecommunication system. The power measurement device and the additional power measurement device can respectively be integrated into different components of the telecommunication system. The power measurement device and the additional power measurement device can respectively measure the power of the test signal at different measurement points in the signal path. The controller can normalize signals transmitted via the telecommunication system by adjusting a path gain for the signal path based on measurements from the power measurement device and the additional power measurement device.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/12 - MonitoringTesting of transmitters for calibration of transmit antennas, e.g. of amplitude or phase
• H04W 24/10 - Scheduling measurement reports
• H04W 88/08 - Access point devices
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04W 52/24 - TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
• H04B 1/40 - Circuits
• H04W 52/14 - Separate analysis of uplink or downlink

Abstract

A master unit and a remote unit is provided for a multiband transmission system for distributing and combining signals of at least one wireless communication network and at least one digital network. A reference frequency generator is arranged in the master unit, the reference frequency generator being designed to clock a master modem for converting the signals of the at least one digital network. The reference frequency signal emitted by the reference frequency signal is restored via a reference frequency receiver and is used for closing a remote modem that is located there for demodulation.

IPC Classes  ?

• H04W 88/08 - Access point devices
• H04L 7/06 - Speed or phase control by synchronisation signals the synchronisation signals differing from the information signals in amplitude, polarity, or frequency

Abstract

A re-configurable distributed antenna system that includes a plurality of base transceiver stations and a plurality of remote antenna units is provided. The plurality of the remote antenna units are configured and arranged to provide communication services for a plurality of coverage zones. A signal router selectively routes signal communication paths between a plurality of base transceiver stations and the plurality of the remote antenna units. At least one memory is configured to store routing scenarios and distributed antenna system configurations associated with the stored routing scenarios. Moreover, at least one controller dynamically controls the signal router to selectively route the signal communication paths between the plurality of base transceiver stations and the plurality of remote antenna units based at least in part on a then current need of communication service capacity within the plurality of coverage zones and the stored coverage routing scenarios.

IPC Classes  ?

• H04B 1/40 - Circuits

Abstract

A re-configurable distributed antenna system that includes a plurality of base transceiver stations and a plurality of remote antenna units is provided. The plurality of the remote antenna units are configured and arranged to provide communication services for a plurality of coverage zones. A signal router selectively routes signal communication paths between a plurality of base transceiver stations and the plurality of the remote antenna units. At least one memory is configured to store routing scenarios and distributed antenna system configurations associated with the stored routing scenarios. Moreover, at least one controller dynamically controls the signal router to selectively route the signal communication paths between the plurality of base transceiver stations and the plurality of remote antenna units based at least in part on a then current need of communication service capacity within the plurality of coverage zones and the stored coverage routing scenarios.

IPC Classes  ?

• H01Q 19/12 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
• H04B 1/40 - Circuits
• H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure
• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
• H01Q 3/02 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
• H01Q 3/20 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device wherein the primary active element is fixed and the reflecting device is movable
• H04B 7/185 - Space-based or airborne stations

Abstract

In an embodiment, a signal repeater includes a master unit and a remote unit that are optically coupled to one another by, e.g., an optical fiber. The master unit includes master-unit circuitry configured to receive an input electrical signal from a satellite-signal receive antenna, and to convert the input electrical signal into an optical signal. And the remote unit includes remote-unit circuitry configured to convert the optical signal into an intermediate electrical signal, to amplify the intermediate electrical signal to generate an output electrical signal, and to couple the output electrical signal to a retransmission antenna. Because an optical channel, such as an optical fiber, typically attenuates an optical signal significantly less per unit of distance than a coaxial cable attenuates an electrical signal, such a signal repeater allows a satellite receive antenna to be located at a significant distance from a retransmit antenna.

IPC Classes  ?

• H04B 7/185 - Space-based or airborne stations
• H04B 7/155 - Ground-based stations
• H04B 10/25 - Arrangements specific to fibre transmission
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier

Abstract

e.ge.g., an optical fiber. The master unit includes master-unit circuitry configured to receive an input electrical signal from a satellite-signal receive antenna, and to convert the input electrical signal into an optical signal. And the remote unit includes remote-unit circuitry configured to convert the optical signal into an intermediate electrical signal, to amplify the intermediate electrical signal to generate an output electrical signal, and to couple the output electrical signal to a retransmission antenna. Because an optical channel, such as an optical fiber, typically attenuates an optical signal significantly less per unit of distance than a coaxial cable attenuates an electrical signal, such a signal repeater allows a satellite receive antenna to be located at a significant distance from a retransmit antenna.

IPC Classes  ?

• H04B 10/25 - Arrangements specific to fibre transmission
• H04B 7/155 - Ground-based stations

Abstract

In one embodiment, a distributed antenna system comprises at least one master unit; at least one remote antenna unit coupled to the master unit and comprising a power amplifier to radiate a remote downlink radio frequency signal, the remote antenna unit further configured to receive a remote uplink radio frequency signal from at least one antenna, the remote downlink radio frequency signal comprises first and second downlink frequency bands and wherein the remote uplink radio frequency signal comprises first and second uplink frequency bands; a band suppression module comprising: a controller; an uplink band suppression element configured to apply an attenuation to suppress the first uplink frequency band in response to a signal from the controller; and a downlink band suppression element configured to apply an attenuation to suppress the first downlink frequency band in response to the signal from the band suppression controller.

IPC Classes  ?

• H04L 5/00 - Arrangements affording multiple use of the transmission path
• H04W 28/08 - Load balancing or load distribution
• H04B 1/10 - Means associated with receiver for limiting or suppressing noise or interference
• H04B 7/022 - Site diversityMacro-diversity
• H04W 28/18 - Negotiating wireless communication parameters
• H04W 72/04 - Wireless resource allocation
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04W 88/08 - Access point devices

Abstract

In one embodiment, a distributed antenna system comprises: at least one master unit; at least one remote antenna unit communicatively coupled via a switch to the master unit by a primary cable and a secondary cable both coupled to the switch, the remote antenna unit comprising a compensating link check module that outputs a control signal to the switch, wherein the switch selects between the primary and secondary cable in response to the control signal; wherein the compensating link check module controls the switch to momentarily select the secondary cable to perform a link check during which the remote unit measures a quality metric of a downlink signal received via the secondary cable; and upon initiation of the link check, the compensating link check module adjusts an attenuation of the downlink signal received on the secondary cable by loading calibration settings for the secondary cable into a compensation attenuator.

IPC Classes  ?

• H04B 17/309 - Measuring or estimating channel quality parameters
• H04B 10/079 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• H04Q 11/00 - Selecting arrangements for multiplex systems
• G01M 11/00 - Testing of optical apparatusTesting structures by optical methods not otherwise provided for
• G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
• H04B 17/00 - MonitoringTesting
• H04W 24/08 - Testing using real traffic
• H04W 88/08 - Access point devices

Abstract

In one embodiment, a distributed antenna system comprises at least one master unit; at least one remote antenna unit coupled to the master unit and comprising a power amplifier to radiate a remote downlink radio frequency signal, the remote antenna unit further configured to receive a remote uplink radio frequency signal from at least one antenna, the remote downlink radio frequency signal comprises first and second downlink frequency bands and wherein the remote uplink radio frequency signal comprises first and second uplink frequency bands; a band suppression module comprising: a controller; an uplink band suppression element configured to apply an attenuation to suppress the first uplink frequency band in response to a signal from the controller; and a downlink band suppression element configured to apply an attenuation to suppress the first downlink frequency band in response to the signal from the band suppression controller.

IPC Classes  ?

• H04W 88/08 - Access point devices
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission

Abstract

In one embodiment, a distributed antenna system comprises: at least one master unit; at least one remote antenna unit communicatively coupled via a switch to the master unit by a primary cable and a secondary cable both coupled to the switch, the remote antenna unit comprising a compensating link check module that outputs a control signal to the switch, wherein the switch selects between the primary and secondary cable in response to the control signal; wherein the compensating link check module controls the switch to momentarily select the secondary cable to perform a link check during which the remote unit measures a quality metric of a downlink signal received via the secondary cable; and upon initiation of the link check, the compensating link check module adjusts an attenuation of the downlink signal received on the secondary cable by loading calibration settings for the secondary cable into a compensation attenuator.

IPC Classes  ?

• G01M 11/00 - Testing of optical apparatusTesting structures by optical methods not otherwise provided for
• G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
• H04B 10/079 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
• H04B 17/00 - MonitoringTesting
• H04W 24/08 - Testing using real traffic
• H04W 88/08 - Access point devices
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier

Abstract

A method for determining threshold signal power for a switching control module of a TDD switching sub-system includes setting a threshold signal power to a first value, wherein the threshold signal power is compared to a measured signal power of a downlink path signal of a telecommunication system from a measurement receiver; determining a first downlink signal time using the first value; adjusting the threshold signal power to a second value; determining a second downlink signal time using the second value; determining a difference between the first and second downlink signal times; when difference between the first and second downlink signal times does not exceed a predetermined threshold, determining whether the second downlink signal time corresponds to a valid downlink signal time; when second downlink signal time corresponds to a valid downlink signal time, setting a fixed threshold signal power for use during online operation of the switching control module.

IPC Classes  ?

• H04B 7/26 - Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04W 52/02 - Power saving arrangements
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission

Abstract

A self-locking front panel is provided that includes a base plate and first and second retaining members. The first retaining member extends from a back side of the base plate and terminates in a first retaining portion. The first retaining portion has a first rounded portion that bulges out in a direction of a first end edge of the base plate. The second retaining member also extends from the back side of the base plate a select distance from the first retaining member. The second retaining member terminates in a second retaining portion. The second retaining portion has a second rounded portion that bulges out in a direction of a second end edge of the base plate. The first and second retaining members are made of a resilient material that flexes under a load and returns to an original position when the load is removed. Other embodiments are disclosed.

IPC Classes  ?

• F16B 5/00 - Joining sheets or plates to one another or to strips or bars parallel to them
• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details
• F16B 5/12 - Fastening strips or bars to sheets or plates, e.g. rubber strips, decorative strips for motor vehicles, by means of clips
• F16B 5/06 - Joining sheets or plates to one another or to strips or bars parallel to them by means of clamps or clips
• F16B 1/00 - Devices for securing together, or preventing relative movement between, constructional elements or machine parts

Abstract

A self-locking front panel is provided that includes a base plate and first and second retaining members. The first retaining member extends from a back side of the base plate and terminates in a first retaining portion. The first retaining portion has a first rounded portion that bulges out in a direction of a first end edge of the base plate. The second retaining member also extends from the back side of the base plate a select distance from the first retaining member. The second retaining member terminates in a second retaining portion. The second retaining portion has a second rounded portion that bulges out in a direction of a second end edge of the base plate. The first and second retaining members are made of a resilient material that flexes under a load and returns to an original position when the load is removed. Other embodiments are disclosed.

IPC Classes  ?

• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details

Abstract

In one embodiment, a distributed antenna system comprises: a master unit configured to receive a base station downlink radio frequency signal and to transmit a base station uplink radio frequency signal; and at least one remote antenna unit that is communicatively coupled to the master unit using at least one cable, the remote antenna unit configured to radiate a remote downlink radio frequency signal and to receive a remote uplink radio frequency signal; wherein the master unit comprises: a controller; and a respective interface to couple the controller to a first operator control panel; wherein the at least one remote antenna unit comprises: a controller; and a respective interface to couple the controller to a second operator control panel; wherein the master unit controller and the remote unit controller synchronize at least some information between the first and second operator control panels over the at least one cable.

IPC Classes  ?

• H04B 7/00 - Radio transmission systems, i.e. using radiation field
• H04B 1/40 - Circuits

Abstract

In one example, a repeater system includes a master unit on a movable object configured to couple to antennas for receiving a downlink RF signal from at least one base station external to the movable object and for transmitting an uplink RF signal towards the at least one base station; and a plurality of remote units each configured to couple to the master unit, each positioned on the movable object and associated with different coverage areas, the remote units each configured to couple to a respective antenna system for transmitting the downlink RF signal into respective coverage areas and for receiving the uplink RF signal from the coverage areas, a control unit, wherein, for at least a subgroup of the remote units, a gain for each remote unit is dynamically adjusted in a time-offset fashion by the control unit to trigger handovers between overlapping base-station cells in a time-offset manner.

IPC Classes  ?

• H04B 7/15 - Active relay systems
• H04B 7/155 - Ground-based stations
• H04W 84/00 - Network topologies
• H04W 84/04 - Large scale networksDeep hierarchical networks
• H04W 36/00 - Handoff or reselecting arrangements

Abstract

In one embodiment, a distributed antenna system comprises: a master unit configured to receive a base station downlink radio frequency signal and to transmit a base station uplink radio frequency signal; and at least one remote antenna unit that is communicatively coupled to the master unit using at least one cable, the remote antenna unit configured to radiate a remote downlink radio frequency signal and to receive a remote uplink radio frequency signal; wherein the master unit comprises: a controller; and a respective interface to couple the controller to a first operator control panel; wherein the at least one remote antenna unit comprises: a controller; and a respective interface to couple the controller to a second operator control panel; wherein the master unit controller and the remote unit controller synchronize at least some information between the first and second operator control panels over the at least one cable.

IPC Classes  ?

• H04B 7/00 - Radio transmission systems, i.e. using radiation field
• H04Q 11/00 - Selecting arrangements for multiplex systems
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• H04W 56/00 - Synchronisation arrangements
• H04B 10/25 - Arrangements specific to fibre transmission
• H04W 16/28 - Cell structures using beam steering
• H04B 1/40 - Circuits
• H01Q 3/00 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
• H04W 88/08 - Access point devices
• H04B 7/024 - Co-operative use of antennas at several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems

Abstract

One embodiment is directed to a multiple input, multiple output (“MIMO”) telecommunications system comprising a plurality of signal paths. The system further comprises mixers located in the plurality of signal paths, the mixers being coupled to oscillators for producing a plurality of signals occupying non-overlapping frequency bands and representative of wireless signals. The system further comprises a summer coupled to the plurality of signal paths for summing the plurality of signals to form summed signals. The system further comprises a shared analog-to-digital converter for converting the summed signals to digital signals.

IPC Classes  ?

• H04B 7/04 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
• H04B 7/0413 - MIMO systems
• H04W 88/08 - Access point devices
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04B 1/26 - Circuits for superheterodyne receivers
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04L 25/02 - Baseband systems Details
• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks

Abstract

Repeater systems and methods are disclosed. In one embodiment, a repeater system located within a coverage area comprises: a host configured to combine multiple downlink signals from multiple communication sources located outside the coverage area into a first combined downlink signal; at least one remote coupled to the host and configured to transmit the first combined downlink signal as a second downlink RF communication signal to terminals within the coverage area. The at least one remote is configured to produce a combined uplink signal from multiple uplink signals received through multiple communication links from the terminals, and configured to forward the combined uplink signal to the host. The host produces multiple signals from the combined uplink signal for transmission to the multiple communication sources, wherein a first of the plurality of terminals communicates with a different one of the multiple communication sources than a second of the plurality of terminals.

IPC Classes  ?

• H04B 7/155 - Ground-based stations
• H04W 72/04 - Wireless resource allocation
• H04W 16/14 - Spectrum sharing arrangements
• H04W 84/00 - Network topologies
• H04W 84/04 - Large scale networksDeep hierarchical networks

Abstract

Uplink leveling systems and methods for a distribution antenna are provided. An uplink leveling system includes at least one communication path between a base station point of interface and a remote antenna unit. A broadband measurement detector is communicatively coupled to measure signal power in the at least one communication path at the base station point of interface. A signal measurement receiver is communicatively coupled to measure signal power in the at least one communication path. A test signal generator is configured to generate a test signal in the at least one communication path in an uplink. At least one controller is configured to level the communication path in the uplink direction based at least in part on measurements by the broadband measurement detector and the signal measurement receiver in response to the generated test signal by the test signal generator.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/21 - MonitoringTesting of receivers for calibrationMonitoringTesting of receivers for correcting measurements
• H04B 17/345 - Interference values

Abstract

Uplink leveling systems and methods for a distribution antenna are provided. An uplink leveling system includes at least one communication path between a base station point of interface and a remote antenna unit. A broadband measurement detector is communicatively coupled to measure signal power in the at least one communication path at the base station point of interface. A signal measurement receiver is communicatively coupled to measure signal power in the at least one communication path. A test signal generator is configured to generate a test signal in the at least one communication path in an uplink. At least one controller is configured to level the communication path in the uplink direction based at least in part on measurements by the broadband measurement detector and the signal measurement receiver in response to the generated test signal by the test signal generator.

IPC Classes  ?

• H04W 72/04 - Wireless resource allocation
• H04W 24/10 - Scheduling measurement reports
• H04W 52/14 - Separate analysis of uplink or downlink
• H04L 1/00 - Arrangements for detecting or preventing errors in the information received
• H04B 7/022 - Site diversityMacro-diversity
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04W 88/08 - Access point devices
• H04B 17/21 - MonitoringTesting of receivers for calibrationMonitoringTesting of receivers for correcting measurements

Abstract

Certain aspects are directed to a capacity optimization sub-system for a distributed antenna system. The capacity optimization sub-system includes a switch matrix and a controller. The switch matrix includes variable attenuators and switches. The switch matrix can receive sectors from base stations. The switch matrix can provide the sectors to coverage zones. The controller can communicate with the switch matrix. The controller can determine that a number of wireless devices in one or more of the coverage zones is outside a specified range of threshold traffic levels. In response to determining that the number of wireless devices is outside the specified range of threshold traffic levels, the controller can configure one or more of the variable attenuators and corresponding switches to redistribute capacity among the coverage zones by, for example, increasing and/or decreasing capacity in one or more of the coverage zones.

IPC Classes  ?

• H04W 16/24 - Cell structures
• H04W 16/08 - Load shedding arrangements
• H04W 28/08 - Load balancing or load distribution
• H04W 28/02 - Traffic management, e.g. flow control or congestion control
• H04W 88/08 - Access point devices

Abstract

A switching control module can optimize time division duplexing operations of a distributed antenna system (“DAS”). The switching control module can include a measurement receiver and a processor. The measurement receiver can measure signal powers of downlink signals in a downlink path of the DAS. The processor can determine start times for downlink sub-frames transmitted via the downlink path based on downlink signal powers measured by the measurement receiver exceeding a threshold signal power. The processor can identify a clock setting that controls a timing of switching signals used for switching the DAS between an uplink mode and a downlink mode. The processor can statistically determine a switching time adjustment for the clock setting based on switching time differentials between the clock setting and the start times. The processor can update the clock setting based on the switching time adjustment.

IPC Classes  ?

• H04J 3/06 - Synchronising arrangements
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04W 72/04 - Wireless resource allocation
• H04W 88/08 - Access point devices
• H04B 7/024 - Co-operative use of antennas at several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• H04W 24/02 - Arrangements for optimising operational condition
• H04B 7/022 - Site diversityMacro-diversity

Abstract

Aspects and features are directed to an uplink integrity detection sub-system. In one aspect, a distributed antenna system is provided that includes at least one master unit; a plurality of remote antenna units each in communication with the at least one master unit; and a system controller configured to: determine a noise figure for an uplink path from at least one of the plurality of remote antenna units; and modify a gain of the uplink path when the noise figure exceeds a desired threshold, wherein the noise figure is determined as a function of a measured signal power of an undesirable signal component in the uplink path from the remote antenna unit.

IPC Classes  ?

• H04B 1/16 - Circuits
• H04W 52/52 - Transmission power control [TPC] using AGC [Automatic Gain Control] circuits or amplifiers
• H03G 3/30 - Automatic control in amplifiers having semiconductor devices
• H04B 17/21 - MonitoringTesting of receivers for calibrationMonitoringTesting of receivers for correcting measurements
• H04B 17/345 - Interference values
• H04B 7/024 - Co-operative use of antennas at several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• H04W 24/08 - Testing using real traffic
• H04W 52/14 - Separate analysis of uplink or downlink
• H04W 52/24 - TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
• H04W 52/42 - TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
• H04W 88/08 - Access point devices
• H04B 17/318 - Received signal strength

Abstract

A distributed antenna system includes a plurality of remote antenna units with a passive element coupled to at least one of the remote antenna units at a connection juncture. An RFID system is associated with the first passive element and has RFID data identifying the first passive element. An interrogator unit is associated with the remote antenna unit and is configured for generating a least one signal for transmission to the passive element to be reflected at the connection juncture and received at the interrogator unit. The interrogator unit is also configured for generating at least one signal for transmission to the RFID system to obtain the RFID data identifying the passive element. Processing circuitry processes the reflected signal and measures a parameter of the first passive element. The processing circuitry correlates the measured parameter with the RFID data for the passive element.

IPC Classes  ?

• G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
• G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
• H04W 24/06 - Testing using simulated traffic
• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations
• H04W 88/08 - Access point devices

Abstract

Certain aspects involve an interface device for a distributed antenna system (“DAS”). In some aspects, the interface device can include an interface, a power detector, and a processor. The interface can include one or more ports for communicatively coupling the interface device to a base station and a switch that is switchable between first and second configurations. The first configuration connects a port to a downlink path of the DAS, and the second configuration connects the port to a signal reflection path. The processor can switch the switch between the first and second configurations based on a signal power measured by the power detector at the port. In other aspects, the interface device can include additional ports and termination loads. The processor can cause a signal path to be connected to a termination load instead of a port based on the port being disconnected from a unit of the DAS.

IPC Classes  ?

• H04W 52/02 - Power saving arrangements
• H04B 7/024 - Co-operative use of antennas at several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• H04W 24/10 - Scheduling measurement reports
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04B 1/04 - Circuits

Abstract

An optimization system for use in a digital repeater system comprises at least one input port for receiving a carrier signal associated with a communication channel of a telecommunication network, at least one meter unit for obtaining an estimate of the error vector magnitude for the carrier signal, and at least one crest factor reduction unit for dynamically reducing, based on the estimate of the error vector magnitude, the crest factor of the carrier signal.

IPC Classes  ?

• H04L 25/49 - Transmitting circuitsReceiving circuits using code conversion at the transmitterTransmitting circuitsReceiving circuits using predistortionTransmitting circuitsReceiving circuits using insertion of idle bits for obtaining a desired frequency spectrumTransmitting circuitsReceiving circuits using three or more amplitude levels
• H04B 1/04 - Circuits
• H04L 27/26 - Systems using multi-frequency codes

Abstract

A repeater system includes a first master unit and a second master unit located on the movable object, such as a train. The master units are each connected to an antenna for receiving a downlink RF signal from at least one base station outside of the movable object and for transmitting an uplink RF signal towards the base station. Remote units are associated with different coverage areas within the movable object and are connected to the master units unit via a transport medium. The remote units are each connected to an antenna system for transmitting the downlink RF signal into the associated coverage area of the movable object and for receiving the uplink RF signal from the coverage area. A control unit can control first gain for the connection with the first master unit and a second gain for the connection with the second master unit.

IPC Classes  ?

• H04B 7/14 - Relay systems
• H04B 7/155 - Ground-based stations
• H04W 84/00 - Network topologies
• H04W 84/04 - Large scale networksDeep hierarchical networks
• H04W 36/00 - Handoff or reselecting arrangements

Abstract

Certain features relate to a telecommunications system with a modular frequency combiner combining multiple received signals at different frequency bands without using frequency-dependent multiplexers. The frequency combiner can include adjustable tuning elements for adjusting various signal-processing parameters of the frequency combiner while the frequency combiner is in the telecommunications system. For example, adjustable tuning elements can adjust the phases of phase shifters of each RF path so that the RF paths are matched for combining the received signals and outputting them through an output port. The adjustable tuning elements can also adjust the electrical length or physical length of the transmission lines that carry the received signals. The adjustable tuning elements can be adjusted manually or automatically while the frequency combiner is deployed in the field in the telecommunications system.

IPC Classes  ?

• H04B 7/02 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas
• H04B 7/12 - Frequency diversity
• H04L 1/04 - Arrangements for detecting or preventing errors in the information received by diversity reception using frequency diversity
• H04L 27/28 - Systems using multi-frequency codes with simultaneous transmission of different frequencies each representing one code element
• H04B 7/155 - Ground-based stations
• G10L 19/093 - Determination or coding of the excitation functionDetermination or coding of the long-term prediction parameters using sinusoidal excitation models

Abstract

In one embodiment, a TDD repeater system comprises: a master unit comprising separate uplink and downlink signal paths defined therein, and configured to couple in an uplink direction to a base station and in a downlink direction to at least one remote antenna unit, wherein the uplink path communicates uplink communication signals, wherein the downlink path communicates downlink communication signals; a switch configured to change direction of signal transmissions within the master unit between the uplink communication signals and the downlink communication signals; a synchronizing unit is configured to receive via the downlink signal path a clock signal from the downlink communication signals, wherein the synchronizing unit supplies a control signal to the switch corresponding to the clock signal; wherein the switch swaps the direction of signal transmissions within the master unit between the uplink communication signals and the downlink communication signals in response to the control signal.

IPC Classes  ?

• H04B 3/36 - Repeater circuits
• H04B 7/155 - Ground-based stations
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04L 7/00 - Arrangements for synchronising receiver with transmitter
• H04B 7/0413 - MIMO systems

Abstract

A method and apparatus for determining placement of a plurality of simulated antennas of a simulated distributed antenna system (DAS) for handling simulated MIMO signals in a simulated environment includes: at a first simulated location, simulating communication of a first simulated MIMO signal by a first remote unit over a first simulated air interface; at a second simulated location, simulating communication of a second simulated MIMO signal by a second remote unit over a second simulated air interface; the first simulated location and the second simulated location arranged within the simulated environment to provide overlapping simulated signal coverage of both the first simulated MIMO signal and the second simulated MIMO signal at a third simulated location; and analyzing at least a first simulated received power of the first simulated MIMO signal and a second simulated received power of the second simulated MIMO signal at the third simulated location.

IPC Classes  ?

• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04B 10/00 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
• H04B 7/0413 - MIMO systems
• H04B 7/022 - Site diversityMacro-diversity
• H04B 7/026 - Co-operative diversity, e.g. using fixed or mobile stations as relays
• H04B 17/309 - Measuring or estimating channel quality parameters
• H04B 7/10 - Polarisation diversityDirectional diversity
• H04B 7/0426 - Power distribution
• H04B 7/0452 - Multi-user MIMO systems

Abstract

A telecommunications system is provided that is controllably operable as a sectorized antenna system and as an omnidirectional antenna system without requiring hardware reconfiguration. The telecommunications system includes a phase correlation measurement unit that can be between a sectorized antenna sub-system and a remotely located RF source site. The phase correlation measurement unit can be coupled to the RF source site over at least one feed line. The phase correlation measurement unit can output signals for controlling a phase shifter at the RF source site for phase shifting downlink signals and for causing operation of the sectorized antenna sub-system as an omnidirectional antenna sub-system. In a sectorized operation mode, the phase correlation measurement unit and the phase shifter can be inactivated.

IPC Classes  ?

• H04M 3/00 - Automatic or semi-automatic exchanges
• H04W 16/28 - Cell structures using beam steering
• H04B 7/0491 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
• H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
• H04W 88/08 - Access point devices
• H01Q 3/00 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
• H04W 24/02 - Arrangements for optimising operational condition
• H04W 88/10 - Access point devices adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

Scalable telecommunications systems and methods are provided. In one embodiment, a node unit for a scalable telecommunications system comprises: a plurality of universal digital RF transceivers each configured to communicatively couple the node unit to external equipment; one or more universal digital transport interfaces each configured to communicatively couple the node unit to a respective transport link; a universal backplane communicatively coupled to the universal digital RF transceivers and universal digital transport interfaces; and a system controller; wherein each of the universal digital RF transceivers is configured to couple to a respective modular power amplifier and a modular duplexer inserted within the node unit. The system controller is configured to detect capabilities of at least one of the universal digital RF transceivers, the universal digital transport interfaces, the universal backplane, the modular power amplifier and modular duplexer, and adjust parameters of the node unit in response to the detected capabilities.

IPC Classes  ?

• H04B 1/38 - Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04W 52/52 - Transmission power control [TPC] using AGC [Automatic Gain Control] circuits or amplifiers
• H04W 88/08 - Access point devices
• H04L 25/02 - Baseband systems Details
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04B 1/403 - Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency

Abstract

Duplexing and combining networks are provided. In one embodiment, a duplexing network for combining two signals comprises: a first port; a second port; a third port; a first hybrid coupler coupled to the first port; a second hybrid coupler coupled to the second port; a third hybrid coupler coupled to the third port; wherein the first, second, and third hybrid couplers are each four-port quadrature hybrid couplers; wherein the first hybrid splits a first signal received at the first port between a first diplexer and a second diplexer; wherein the second hybrid splits a second signal received at the first port between the first diplexer and the second diplexer; the third hybrid receives a first composite signal from the first diplexer and a second composite signal from the second diplexer and constructively sums the first composite signal and the second composite signal to produce an output at the third port.

IPC Classes  ?

• H04B 1/525 - Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
• H03H 7/46 - Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
• H04W 88/08 - Access point devices

Abstract

One embodiment is directed to a system in which an end node and a boundary link optimizer node are communicatively coupled to an ETHERNET network. The end node is communicatively coupled to the ETHERNET network using a boundary link that is connected to an edge of the ETHERNET network. A virtual local area network (VLAN) is established in the ETHERNET network that includes a first end point at the edge of the ETHERNET network and a second end point at the boundary link optimizer node. The boundary link optimizer node is configured to: receive ETHERNET packets that include data for the plurality of streams of digital samples; extract the data for the plurality of streams from the received ETHERNET packets; bundle the data for the streams of digital samples; and communicate, to the end node over the VLAN, the bundled data for the streams of digital samples in ETHERNET packets.

IPC Classes  ?

• H04B 7/02 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas
• H04W 88/00 - Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
• H04L 12/46 - Interconnection of networks

Abstract

In one embodiment, a signal-processing apparatus for generating an amplified output signal based on an input signal is provided. The apparatus comprises: an amplifier configured to generate the output signal, wherein the amplifier is configured to receive a supply voltage; and a limiter configured to inhibit increases in the input signal power level from being applied to the amplifier, wherein the limiter comprises: a variable attenuator configured to selectively attenuate the input signal before being applied to the amplifier; wherein the limiter integrates over a voltage difference between a current measure of attenuated input signal power level and a limiter threshold level to control a level of attenuation applied by the variable attenuator to the input signal.

IPC Classes  ?

• H03G 3/20 - Automatic control
• H03G 11/08 - Limiting rate of change of amplitude
• H03G 11/04 - Limiting level dependent on strength of signalLimiting level dependent on strength of carrier on which signal is modulated
• H03F 1/02 - Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation

Abstract

A microwave filter comprises at least one resonant filter element resonating at a resonant frequency and having a housing, a resonant filter cavity arranged in the housing and a resonator element arranged in the housing. At least two tuning elements are arranged on the housing of the resonant filter element and each extend into the cavity with a shaft portion, wherein the two tuning elements are movable with respect to the housing to adjust the length of the shaft portion extending into the housing and wherein the at least two tuning elements are constituted and designed such that by adjusting the length of the shaft portion of each tuning element extending into the housing a temperature drift of the resonant frequency is adjustable.

IPC Classes  ?

• H01P 1/205 - Comb or interdigital filtersCascaded coaxial cavities
• H01P 1/208 - Cascaded cavitiesCascaded resonators inside a hollow waveguide structure
• H01P 1/30 - Auxiliary devices for compensation of, or protection against, temperature or moisture effects
• H01P 7/04 - Coaxial resonators

Abstract

A repeater system including bi-directional amplifier circuitry that is configured for repeating signals between at least one device and a first signal source. Receiver circuitry is coupled with the amplifier circuitry provides at least one signal associated with at least one of a device or the first signal source or a second signal source. Controller circuitry is configured for monitoring a parameter of a provided signal that is reflective of a property of a signal source or a device. The monitored parameter is used to make a determination of whether repeated signals associated with the first signal source will desensitize the operation of the second signal source. The controller circuitry is also operable for adjusting the power level of the signals that are repeated by the bi-directional amplifier circuitry based on the determination that repeated signals will desensitize the operation of the second signal source.

IPC Classes  ?

• H04B 7/155 - Ground-based stations
• H04W 24/08 - Testing using real traffic
• H04W 88/08 - Access point devices

Abstract

One aspect is directed to a node unit for a scalable telecommunications system. The node unit is configured to have inserted therein a respective power amplifier module and duplexing module for each of a plurality universal digital RF transceiver modules. The node unit is configured to communicatively couple an input of each power amplifier module to an output of the respective universal digital RF transceiver module. The node unit is configured to communicatively couple each universal digital RF transceiver module to respective external equipment via a duplexing module. At least one module comprises a module identifier. The system controller is configured to read the at least one module identifier and to configure the operation of at least one of universal digital RF transceiver modules, universal digital transport interface modules, and universal backplane module based on the at least one module identifier.

IPC Classes  ?

• H04L 25/02 - Baseband systems Details
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04B 1/38 - Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• H04W 52/52 - Transmission power control [TPC] using AGC [Automatic Gain Control] circuits or amplifiers
• H04B 1/403 - Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency

Abstract

One embodiment is directed to a microwave cavity resonator comprises a cavity housing forming a cavity. A resonator element is arranged in the cavity and extends longitudinally along a longitudinal axis, wherein the resonator element comprises, when viewed along the longitudinal axis, a first end connected to a first housing wall and a second end opposite the first end, the second end being arranged at a distance from a second housing wall. The resonator element, at its second end, comprises at least one first capacitor element and the cavity housing comprises at least one second capacitor element reaching into the cavity and arranged at a distance, when viewed along a direction perpendicular to the longitudinal axis, from the at least one first capacitor element such that a gap between the at least one first capacitor element and the at least one second capacitor element is formed.

IPC Classes  ?

• H01P 7/04 - Coaxial resonators
• H01P 7/06 - Cavity resonators
• H01P 1/208 - Cascaded cavitiesCascaded resonators inside a hollow waveguide structure

Abstract

A distributed antenna system includes a plurality of remote antenna units with a passive element coupled to at least one of the remote antenna units at a connection juncture. An RFID system is associated with the first passive element and has RFID data identifying the first passive element. An interrogator unit is associated with the remote antenna unit and is configured for generating a least one signal for transmission to the passive element to be reflected at the connection juncture and received at the interrogator unit. The interrogator unit is also configured for generating at least one signal for transmission to the RFID system to obtain the RFID data identifying the passive element. Processing circuitry processes the reflected signal and measures a parameter of the first passive element. The processing circuitry correlates the measured parameter with the RFID data for the passive element.

IPC Classes  ?

• G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations
• H04W 24/06 - Testing using simulated traffic
• H04W 88/08 - Access point devices

Abstract

A distributed antenna system includes a plurality of remote antenna units with a passive element coupled to at least one of the remote antenna units at a connection juncture. An RFID system is associated with the first passive element and has RFID data identifying the first passive element. An interrogator unit is associated with the remote antenna unit and is configured for generating a least one signal for transmission to the passive element to be reflected at the connection juncture and received at the interrogator unit. The interrogator unit is also configured for generating at least one signal for transmission to the RFID system to obtain the RFID data identifying the passive element. Processing circuitry processes the reflected signal and measures a parameter of the first passive element. The processing circuitry correlates the measured parameter with the RFID data for the passive element.

IPC Classes  ?

• G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
• G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
• H04W 24/06 - Testing using simulated traffic
• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations
• H04W 88/08 - Access point devices

Abstract

A distributed antenna system including a plurality of remote antenna units, a passive element coupled to at least one of the remote antenna units and an RFID system located proximate the passive element. The RFID system includes processing circuitry and measurement circuitry and the processing circuitry is configured for receiving an interrogation signal and processing the interrogation signal and providing a response. The response includes data associated with a measurement made by the measurement circuitry.

IPC Classes  ?

• G06K 19/077 - Constructional details, e.g. mounting of circuits in the carrier
• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations
• H04W 88/08 - Access point devices

Abstract

Examples of distributed base station functionality in a telecommunication system (e.g., a distributed antenna system) are disclosed. In some aspects, the telecommunication system can include an interface with circuitry configured to communicate with one or more base-station entities, base-station components (such as baseband units or remote radio heads), or core-network entities. The telecommunication system can also include radio units that are positioned in an area for providing wireless coverage to terminal devices. The telecommunication system can also include a head-end unit that is communicatively coupled between the interface and the radio units. One or more devices in the telecommunication system can include a low-layer processing module. In some aspects, the low-layer processing module can perform functionality of a secondary e NodeB, such as (but not limited to) radio transport layer processing.In additional or alternative aspects, the low-layer processing module can perform physical layer processing that is split between uplink physical layer processing and downlink physical layer processing and/or split between secondary and primary physical layer processing.

IPC Classes  ?

• H04B 7/26 - Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
• H04B 7/155 - Ground-based stations

Abstract

One aspect is directed to a node unit for a scalable telecommunications system. The node unit is configured to have inserted therein a respective power amplifier module and duplexing module for each of a plurality of universal digital RF transceiver modules. The node unit is configured to communicatively couple an input of each power amplifier module to an output of the respective universal digital RF transceiver module. The node unit is configured to communicatively couple each universal digital RF transceiver module to respective external equipment via a duplexing module. At least one module comprises a module identifier. The system controller is configured to read the at least one module identifier and to configure the operation of at least one of universal digital RF transceiver modules, universal digital transport interface modules, and universal backplane module based on the at least one module identifier.

IPC Classes  ?

• H04B 1/38 - Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving

Abstract

A method and apparatus for determining placement of a plurality of antennas of a distributed antenna system for handling MIMO signals includes, at a first location, simulating the communication of a first MIMO signal by a first remote unit over an air interface in an environment and, at a second location, simulating the communication of a second MIMO signal by a second remote unit over an air interface in the environment. The first and second locations are arranged within the environment to provide overlapping signal coverage of both the first MIMO signal and the second MIMO signal at a third location in the environment. Analysis is made of at least an imbalance of received power between the first and second MIMO signals within the environment at a third location in order to determine whether a desired capacity for MIMO communications with the system has been achieved at the third location.

IPC Classes  ?

• H04B 7/24 - Radio transmission systems, i.e. using radiation field for communication between two or more posts
• H04B 7/0413 - MIMO systems
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04B 7/022 - Site diversityMacro-diversity
• H04B 7/026 - Co-operative diversity, e.g. using fixed or mobile stations as relays
• H04B 17/309 - Measuring or estimating channel quality parameters
• H04B 7/10 - Polarisation diversityDirectional diversity
• H04B 7/0426 - Power distribution
• H04B 7/0452 - Multi-user MIMO systems

Abstract

The present disclosure describes devices, systems, and methods for frame start optimizing in telecommunication systems. Some aspects may involve receiving, by an aggregation device in the telecommunication system, frames from transmitter devices. Some aspects may also involve determining that buffering may be required to sequence the frames for an aggregation operation performed by the aggregation device. The aggregation operation may include a process that combines frames from transmitter devices. In response to determining that the buffering is required, frame adjustment signals may be transmitted to the transmitter devices. The frame adjustment signals may instruct the transmitter devices to transmit subsequent frames such that the buffering is reduced for a subsequent aggregation operation performed by the aggregation device using the subsequent frames.

IPC Classes  ?

• H04J 3/06 - Synchronising arrangements

Abstract

The present disclosure describes devices, systems, and methods for synchronizing multiple-input/multiple-output ("MIMO") signals or other signals in telecommunication systems. Some aspects may involve transmitting signals between a head-end unit and remote units of a telecommunication system. A first delay of a signal path between the head-end unit and a first remote unit of the remote units may be determined to be greater than each delay of signal paths between the head-end unit and other remote units. Based on the first delay, the telecommunication system may be configured to delay transmission of additional signals such that the additional signals are simultaneously transmitted to another unit by either the head-end unit or the remote units.

IPC Classes  ?

• H04W 56/00 - Synchronisation arrangements

Abstract

Certain aspects are directed to a configuration sub-system for telecommunication systems. The configuration sub-system can include a test signal generator, a power measurement device, at least one additional power measurement device, and a controller. The test signal generator can be integrated into components of a telecommunication system. The test signal generator can provide a test signal to a signal path of the telecommunication system. The power measurement device and the additional power measurement device can respectively be integrated into different components of the telecommunication system. The power measurement device and the additional power measurement device can respectively measure the power of the test signal at different measurement points in the signal path. The controller can normalize signals transmitted via the telecommunication system by adjusting a path gain for the signal path based on measurements from the power measurement device and the additional power measurement device.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/12 - MonitoringTesting of transmitters for calibration of transmit antennas, e.g. of amplitude or phase
• H04W 24/10 - Scheduling measurement reports
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04W 88/08 - Access point devices
• H04B 1/40 - Circuits
• H04W 52/24 - TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
• H04W 52/14 - Separate analysis of uplink or downlink

Abstract

An optimization system for use in a digital repeater system comprises at least one input port for receiving a carrier signal associated with a communication channel of a telecommunication network, at least one meter unit for obtaining an estimate of the error vector magnitude for the carrier signal, and at least one crest factor reduction unit for dynamically reducing, based on the estimate of the error vector magnitude, the crest factor of the carrier signal.

IPC Classes  ?

• H04L 27/26 - Systems using multi-frequency codes

Abstract

A telecommunications system may be configured to improve linearity and blocking. In some aspects, the telecommunications system may include a duplexer for coupling a common port to a receive path and a transmit path. A distributed low- noise amplifier having two or more separate active devices (e.g., amplifiers) may be positioned in the receive path. A filtering element (e.g., a band-pass filter) may be positioned between the two or more separate active devices. A signal may be routed by the duplexer through the distributed low-noise amplifier. The filtering element may attenuate transmit signals in the receive path.

IPC Classes  ?

• H04B 1/50 - Circuits using different frequencies for the two directions of communication

Abstract

A telecommunications system may be configured to improve linearity and blocking. In some aspects, the telecommunications system may include a duplexer for coupling a common port to a receive path and a transmit path. A distributed low-noise amplifier having two or more separate active devices (e.g., amplifiers) may be positioned in the receive path. A filtering element (e.g., a band-pass filter) may be positioned between the two or more separate active devices. A signal may be routed by the duplexer through the distributed low-noise amplifier. The filtering element may attenuate transmit signals in the receive path.

IPC Classes  ?

• H04B 3/36 - Repeater circuits
• H04B 7/26 - Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
• H04B 1/50 - Circuits using different frequencies for the two directions of communication
• H04B 7/155 - Ground-based stations
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04W 84/04 - Large scale networksDeep hierarchical networks
• H04W 88/08 - Access point devices

Abstract

A telecommunications system can include analog-to-digital converters in an uplink communication path or a downlink communication path. The analog-to-digital converters can have a high dynamic range and bandwidth to obviate a need for down-conversion of signals using an analog mixer. The uplink communication path and the downlink communication path can be coupled to an antenna using a non- duplexer coupling device. Uplink signals traversing the uplink communication path can be isolated from downlink signals independent of using a duplexer.

IPC Classes  ?

• H04B 1/48 - Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
• H04B 1/52 - Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa

Abstract

A telecommunications system may include a distortion cancellation subsystem for use with a circulator device coupling an antenna to a transmit path and a receive path. The distortion cancellation subsystem may include a correction circuit and a cancellation circuit. In some aspects, the correction circuit may include a processing device or adaptive filter to correct imperfections in transmit signal samples generated by directional couplers. The correction circuit may also include a summing device to remove receive signal components from the transmit signal samples. The cancellation circuit may receive the output signal of the correction circuit via an adaptive filter. The output of the adaptive filter may be summed with a receive signal to minimize distortion of the receive signal.

IPC Classes  ?

• H04B 1/48 - Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
• H04B 1/52 - Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa

Abstract

One embodiment is directed to an uplink signal combiner that is configured to receive, via the data network, data packets from the remote antenna units. Each of the data packets includes respective control data and respective user data. The respective control data include data for managing a communication link between a baseband unit and a respective remote antenna unit. The respective user data represents a respective uplink signal received by each of the remote antenna units from one or more mobile stations. The uplink signal combiner is configured to generate additional user data representing a first combined uplink signal by combining the user data extracted from the data packets. The uplink signal combiner is configured to transmit an additional data packet to the baseband unit. The additional data packet includes the additional user data and additional control data derived from the control data from the received data packets.

IPC Classes  ?

• H04L 12/931 - Switch fabric architecture
• H04L 12/721 - Routing procedures, e.g. shortest path routing, source routing, link state routing or distance vector routing
• H04L 29/06 - Communication control; Communication processing characterised by a protocol

Abstract

A repeater system includes a first master unit and a second master unit located on the movable object, such as a train. The master units are each connected to an antenna for receiving a downlink RF signal from at least one base station outside of the movable object and for transmitting an uplink RF signal towards the base station. Remote units are associated with different coverage areas within the movable object and are connected to the master units unit via a transport medium. The remote units are each connected to an antenna system for transmitting the downlink RF signal into the associated coverage area of the movable object and for receiving the uplink RF signal from the coverage area. A control unit can control first gain for the connection with the first master unit and a second gain for the connection with the second master unit.

IPC Classes  ?

• H04B 7/15 - Active relay systems
• H04W 36/00 - Handoff or reselecting arrangements

Abstract

A digital repeater system for repeating RF signals can include a receiving section for receiving an RF input signal that includes a frequency band with at least one subband associated with a communication channel of a telecommunications network. The receiving section can digitize the RF input signal to obtain a digital signal. A filter device includes a digital filter with a passband for filtering the digital signal. The digital filter is configurable by setting filter coefficients. A gain control device can set the gain of at least a portion of the digital signal. A transmitting section can transmit an RF output signal and can convert the digital signal to the RF output signal for transmission. A control unit can configure the filter coefficients of the digital filter based on the gain setting of the gain control device.

IPC Classes  ?

• H04B 7/15 - Active relay systems

Abstract

Certain features relate to a telecommunications system with a modular frequency combiner combining multiple received signals at different frequency bands without using frequency-dependent multiplexers. The frequency combiner can include adjustable tuning elements for adjusting various signal-processing parameters of the frequency combiner while the frequency combiner is in the telecommunications system. For example, adjustable tuning elements can adjust the phases of phase shifters of each RF path so that the RF paths are matched for combining the received signals and outputting them through an output port. The adjustable tuning elements can also adjust the electrical length or physical length of the transmission lines that carry the received signals. The adjustable tuning elements can be adjusted manually or automatically while the frequency combiner is deployed in the field in the telecommunications system.

IPC Classes  ?

• H04B 7/155 - Ground-based stations

Abstract

A telecommunications system can transport information between base transceiver stations and remotely located units for wireless transmission. The system includes an Ethernet switch with circuitry configured for routing information for different zones between the base transceiver stations and the remotely located units.

IPC Classes  ?

• H04W 88/08 - Access point devices

Abstract

A distributed antenna system includes at least one master unit communicatively coupled to at least one base station and a plurality of remote units located remotely from the at least one master unit. The plurality of remote units are communicatively coupled to the master unit over at least one transport communication link. The system is configured to distribute uplink and downlink signals between a base station and mobile units. A digital unit generates digital samples indicative of spectrum included in at least one of the uplink and downlink signals. A network interface communicates with an external computer. The digital unit is configured to process the digital samples and communicate information indicative of the spectrum to the external computer via the network interface.

IPC Classes  ?

• H04B 3/36 - Repeater circuits
• H04B 7/15 - Active relay systems
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• H04W 88/08 - Access point devices
• H04B 7/155 - Ground-based stations

Abstract

A repeater system is provided, the repeater system comprising a front end section and a back end section for providing communication between communication sources and a coverage area. The front end section combines multiple downlink signals from multiple communication sources into a combined downlink signal and transmits the combined downlink signal to the back end section. The back end section produces, from the combined signal, the downlink RF communication signal for transmission into the coverage area. The back end section also produces, from a received uplink RF communication signal, an uplink combined signal. The front end section produces multiple signals from the uplink combined signal received from the back end section for transmission to the communication sources. By these means a repeater system is provided which may provide an approved coverage in a coverage area with the potential of high data rates for communication links in that coverage area.

IPC Classes  ?

• H04B 7/155 - Ground-based stations
• H04W 72/04 - Wireless resource allocation
• H04W 16/14 - Spectrum sharing arrangements
• H04W 84/00 - Network topologies
• H04W 84/04 - Large scale networksDeep hierarchical networks

Abstract

A switching control module can optimize time division duplexing operations of a distributed antenna system (“DAS”). The switching control module can include a measurement receiver and a processor. The measurement receiver can measure signal powers of downlink signals in a downlink path of the DAS. The processor can determine start times for downlink sub-frames transmitted via the downlink path based on downlink signal powers measured by the measurement receiver exceeding a threshold signal power. The processor can identify a clock setting that controls a timing of switching signals used for switching the DAS between an uplink mode and a downlink mode. The processor can statistically determine a switching time adjustment for the clock setting based on switching time differentials between the clock setting and the start times. The processor can update the clock setting based on the switching time adjustment.

IPC Classes  ?

• H04J 3/06 - Synchronising arrangements
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04W 72/04 - Wireless resource allocation
• H04W 88/08 - Access point devices
• H04B 7/024 - Co-operative use of antennas at several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• H04W 24/02 - Arrangements for optimising operational condition
• H04B 7/022 - Site diversityMacro-diversity

Abstract

A repeater (1) particularly suitable for a time-division duplex transmission of communication signals is provided. The repeater (1) comprises a master unit (2) for communicating with a base station (3) of a wireless network, at least one remote unit (4) for communicating with a network terminal, as well as a waveguide (11) connecting the remote unit (4) with the master unit (2) for transmitting the communication signals in an uplink direction (6) from the remote unit (4) to the master unit (2) and in a downlink direction (5) from the master unit (2) to the remote unit (4). Both the master unit (2) and the remote unit (4) comprise one switch (19, 20) each for changing over the signal transmission between uplink direction (6) and downlink direction (5). Both switches (19, 20) are selected by a synchronizing unit (21) arranged in the master unit (2), the synchronizing unit (21) being designed for determining a clock pulsing from the communication signal fed to the master unit (2)—in particular from the base station (3)—and for supplying a control signal corresponding to this clock pulsing to the switches (19, 20).

IPC Classes  ?

• H04B 3/36 - Repeater circuits
• H04B 7/155 - Ground-based stations
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04L 7/00 - Arrangements for synchronising receiver with transmitter
• H04B 7/0413 - MIMO systems

Abstract

A distributed antenna system includes a multiple-input and multiple-output (MIMO) base station configured to output at least a first signal and a second signal. At least one master unit communicates with the MIMO base station. At least one remote unit communicates with the master unit. At least one antenna is coupled with the remote unit for receiving signals from the remote unit. A coupler element is configured for introducing a phase shift in a portion of at least the first MIMO signal and for combining the phase shifted first MIMO signal portion with a portion of the second MIMO signal and presenting the combined first and second MIMO signal portions at an output port of the coupler element. An antenna is configured for receiving the combined MIMO signal portions for transmission.

IPC Classes  ?

• H04B 10/00 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04B 7/024 - Co-operative use of antennas at several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• H04B 7/0452 - Multi-user MIMO systems
• H04W 88/08 - Access point devices
• H04B 7/0413 - MIMO systems
• H04J 14/02 - Wavelength-division multiplex systems
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04L 27/20 - Modulator circuitsTransmitter circuits