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    Radar post processing for sidelobe suppression
    21.
    发明授权
    Radar post processing for sidelobe suppression 有权

    公开(公告)号：US10656248B2

    公开(公告)日：2020-05-19

    申请号：US15592638

    申请日：2017-05-11

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Igal Bilik ,  Alexander Pokrass ,  Moshe Laifenfeld

    IPC: G01S7/41 ,  G01S13/931 ,  G01S7/35 ,  G01S7/32 ,  G01S7/292

    Abstract: A system, method and apparatus for detecting a plurality of targets in a radar device are disclosed. A transmitter transmits a source signal and a receiver receives echo signals from reflection of the source signal from the plurality of targets. A composite signal is generated that includes a plurality of target signals from the plurality of echo signals. A largest signal in the composite signal is identified and a value of a parameter of the largest signal is estimated. A representative signal is generated as a convolution of a point target having the estimated value of the parameter. The representative signal is subtracted from the composite signal to obtain a remaining signal. Another of the plurality of targets is determined using the remaining signal.

    Method for LFM radar accuracy improvement without increasing FFT length
    23.
    发明授权
    Method for LFM radar accuracy improvement without increasing FFT length 有权

    公开(公告)号：US10444325B2

    公开(公告)日：2019-10-15

    申请号：US15374193

    申请日：2016-12-09

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Alexander Pokrass ,  Moshe Laifenfeld ,  Igal Bilik

    IPC: G01S13/42 ,  G01S7/35 ,  G01S13/93 ,  G01S7/288 ,  G01S7/292

    Abstract: A method and apparatus for determining a frequency of an echo signal obtained by a radar system is disclosed. The echo signal in response to a source signal of the radar system is received at a receiver. A harmonic oscillator generates a harmonic component signal, and a multiplier multiplies the echo signal with the harmonic component signal to obtain a combined signal. A Fast Fourier Transform (FFT) is performed on the combined signal to obtain a peak in a frequency space, wherein a central frequency of a frequency bin in the frequency space is shifted with respect to the frequency of the echo signal by the harmonic component signal. The frequency of the echo signal is determined from the shifted central frequency.

    TIME SYNCHRONIZATION OF SPATIALLY SEPARATED RADARS
    30.
    发明申请
    TIME SYNCHRONIZATION OF SPATIALLY SEPARATED RADARS 审中-公开

    公开(公告)号：US20180113206A1

    公开(公告)日：2018-04-26

    申请号：US15334843

    申请日：2016-10-26

    Applicant: GM Global Technology Operations LLC

    Inventor： Alexander Pokrass ,  Igal Bilik

    IPC: G01S13/00

    CPC classification number: G01S13/003 ,  G01S7/023 ,  G01S13/343 ,  G01S13/878 ,  G01S13/931

    Abstract: A system and method synchronize two radars by transmitting a linear frequency modulated first signal from a first radar, receiving a first reflection at the first radar based on the first signal, transmitting a linear frequency modulated second signal from a second radar, and receiving a second reflection at the second radar based on the second signal. A fast Fourier transform is performed on the first reflection and on the second reflection to obtain a first frequency-domain signal and a second frequency-domain signal. The first frequency-domain signal and the second frequency-domain signal are converted to the time domain to obtain a first time-domain signal and a second time-domain signal. The first time-domain signal and the second time-domain signal are processed to obtain a time difference in transmission of the first signal and the second signal, and the two radars are adjusted based on the time difference to synchronize subsequent transmissions.

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