A target detection and/or high resolution RF system is provided herein in which the resolution of a legacy target angle detection (direction of arrival) system is improved without any change to the existing hardware of the legacy target detection system. Rather, the target detection and/or high resolution RF system can apply virtual aperture postprocessing to reflected signals to achieve improvements in the detection of one or more targets.
G01S 13/02 - Systems using reflection of radio waves, e.g. primary radar systemsAnalogous systems
G01S 15/32 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 15/36 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
G01S 15/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 15/89 - Sonar systems specially adapted for specific applications for mapping or imaging
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
A target detection and/or high resolution RF system is provided herein in which the resolution of a legacy target angle detection (direction of arrival) system is improved without any change to the existing hardware of the legacy target detection system. Rather, the target detection and/or high resolution RF system can apply virtual aperture postprocessing to reflected signals to achieve improvements in the detection of one or more targets.
G01S 13/02 - Systems using reflection of radio waves, e.g. primary radar systemsAnalogous systems
G01S 15/32 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 15/36 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
G01S 15/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 15/89 - Sonar systems specially adapted for specific applications for mapping or imaging
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
A target detection and/or high resolution RF system is provided herein in which the resolution of a legacy target angle detection (direction of arrival) system is improved without any change to the existing hardware of the legacy target detection system. Rather, the target detection and/or high resolution RF system can apply virtual aperture postprocessing to reflected signals to achieve improvements in the detection of one or more targets.
G01S 13/02 - Systems using reflection of radio waves, e.g. primary radar systemsAnalogous systems
G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 15/32 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 15/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 15/89 - Sonar systems specially adapted for specific applications for mapping or imaging
G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
G01S 15/36 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
A hybrid pulse compression RF system is provided herein in which an enhanced noise waveform and a hybrid waveform are generated to detect a target. For example, the system includes a signal generator that generates an LFM waveform and an enhanced waveform in sequence such that a transmitter of the system transmits the waveforms in the generated sequence in a direction of a possible target. The enhanced waveform may be a partially randomized version of the LFM waveform. If a target is present, the waveforms reflect off the target and are captured by the system in the sequence in which the originally generated waveforms are transmitted. Once captured, the reflected waveforms are processed by the system to generate a hybrid waveform for display such that the range and Doppler resolution and detection capabilities are significantly superior to the state of the art LFM or noise waveform RF systems.
A hybrid pulse compression RF system is provided herein in which an enhanced noise waveform and a hybrid waveform are generated to detect a target. For example, the system includes a signal generator that generates an LFM waveform and an enhanced waveform in sequence such that a transmitter of the system transmits the waveforms in the generated sequence in a direction of a possible target. The enhanced waveform may be a partially randomized version of the LFM waveform. If a target is present, the waveforms reflect off the target and are captured by the system in the sequence in which the originally generated waveforms are transmitted. Once captured, the reflected waveforms are processed by the system to generate a hybrid waveform for display such that the range and Doppler resolution and detection capabilities are significantly superior to the state of the art LFM or noise waveform RF systems.
Systems and methods of optimal pulse compression are described. A pulse compression system can include an operations component that can receive a first signal, transmit the signal toward a target, and receive a reflected signal. A processor can correlate the received signal with an optimized signal in order to generate an image, the optimized signal based on an impulse response function of the operations component. The optimized signal can be the first signal. The optimized signal can be a third signal separate from the first signal.
A61B 8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves
A61B 5/00 - Measuring for diagnostic purposes Identification of persons
A61B 5/055 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fieldsMeasuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
G01S 13/28 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses
G01S 15/10 - Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
G01S 15/89 - Sonar systems specially adapted for specific applications for mapping or imaging
G01S 17/10 - Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
G01S 13/88 - Radar or analogous systems, specially adapted for specific applications
G01S 13/90 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging using synthetic aperture techniques
Systems and methods of optimal pulse compression are described. A method of determining an optimal pulse takes as an input a function of the impulse response of a transducer and produces a pulse optimized for transmission through that transducer. Images then produced with that transducer will have both superior range and spatial resolution.
G01S 13/28 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses
G01S 15/10 - Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
G01S 15/89 - Sonar systems specially adapted for specific applications for mapping or imaging
G01S 17/10 - Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
Systems and methods of optimal pulse compression are described. A method of determining an optimal pulse takes as an input a function of the impulse response of a transducer and produces a pulse optimized for transmission through that transducer. Images then produced with that transducer will have both superior range and spatial resolution.
A structured randomly permutated pulse compression system comprises an FM transmitter configured to receive an input signal and transmit an output signal. The FM transmitter is configured to modulate the frequency of the output signal by modulating the frequency of the output signal according to a structured random permutation of time samples of the input signal. At least one antenna interfaces with the FM transmitter. The FM receiver is configured to auto-correlate the output signal with a return signal.
A free electron laser system includes an undulator having a first and second series of magnets. The first and second series of magnets are substantially parallel to and spaced apart from each other to define a laser cavity between the magnets. An electron source emits an electron beam through the laser cavity. The magnets in the first and second series can have varying polarities. The magnets can be electromagnets with random phase distribution.
The embodiments of the invention generally relate to a novel magnet arrangement to further enhance the performance of the array. The new arrangement of magnets (for example, five configurations) can result in significantly much higher percentage gain in magnetic flux with respect to the largest magnetic flux of a component magnet, as compared to Halbach array configurations.
The embodiments of the invention generally relate to a novel magnet arrangement to further enhance the performance of the array. The new arrangement of magnets (for example, five configurations) can result in significantly much higher percentage gain in magnetic flux with respect to the largest magnetic flux of a component magnet, as compared to Halbach array configurations.
A non-linear FM pulse compression system includes a non-linear FM transmitter adapted to receive an input signal and transmit an output signal. The non-linear FM transmitter is adapted to modulate the frequency of the output signal by at least one of the following: increasing the frequency of the output signal as a logarithmic function of the frequency of samples in the input signal; modulating the frequency of the output signal in inversely proportional relationship to the frequency of samples in the input signal; and modulating the frequency of the output signal according to a random permutation of the frequency of the input signal. At least one antenna interfaces with the non-linear FM transmitter. A non-linear FM receiver interfacing with the at least one antenna. The non-linear FM receiver is adapted to auto-correlate the output signal with a return signal.
G01S 13/32 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
G01S 15/32 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
A61B 8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves
The embodiments of the invention generally relate to a novel magnet arrangement to further enhance the performance of the array. The new arrangement of magnets (for example, five configurations) can result in significantly much higher percentage gain in magnetic flux with respect to the largest magnetic flux of a component magnet, as compared to Halbach array configurations.
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