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    Vehicle radar system and method of calibrating the same
    42.
    发明授权
    Vehicle radar system and method of calibrating the same 有权

    公开(公告)号：US10830869B2

    公开(公告)日：2020-11-10

    申请号：US15979732

    申请日：2018-05-15

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  Silantrix Ltd.

    Inventor： Dani Raphaeli ,  Oded Bialer ,  Igal Bilik

    IPC: G01S7/40 ,  G01S13/58 ,  G01S7/292 ,  G01S13/931

    Abstract: A vehicle radar system and calibration method that provide for system calibration so that target object parameters can be calculated with improved accuracy. Generally speaking, the calibration method uses a number of hypothesized calibration matrices, which represent educated guesses for possible system or array calibrations, to obtain a number of beamforming images. A blurring metric is then derived for each beamforming image, where the blurring metric is generally representative of the quality or resolution of the beamforming image. The method then selects hypothesized calibration matrices based on their blurring metrics, where the selected matrices are associated with the blurring metrics having the best beamforming image resolution (e.g., the least amount of image blurriness). The selected hypothesized calibration matrices are then used to generate new calibration matrices, which in turn can be used to calibrate the vehicle radar system so that more accurate target object parameters can be obtained.

    ACTIVE QUADRATURE CIRCUITS FOR HIGH FREQUENCY APPLICATIONS
    44.
    发明申请
    ACTIVE QUADRATURE CIRCUITS FOR HIGH FREQUENCY APPLICATIONS 审中-公开

    公开(公告)号：US20200266801A1

    公开(公告)日：2020-08-20

    申请号：US15776179

    申请日：2015-12-11

    Applicant: GM Global Technology Operations LLC

    Inventor： Hsuanyu Pan ,  Alexandros Margomenos ,  Hasan Sharifi ,  Igal Bilik

    IPC: H03K3/012

    Abstract: An active quadrature generation circuit configured to provide an in-phase output signal and a quadrature output signal based on an input signal and a method of fabricating the active quadrature generation circuit on an integrated circuit are described. The circuit includes an input node to receive the input signal and a first transistor including a collector connected to a power supply pin. The circuit also includes a second transistor including a base connected to the power supply pin, the second transistor differing in size from the first transistor by a factor of K, wherein the in-phase output signal and the quadrature output signal are generated based on an inherent phase difference of 90 degrees between a current at a collector of the first transistor and a current at a base of the second transistor.

    SLIDING WINDOW INTEGRATION SCHEME FOR OBJECT DETECTION IN A RADAR SYSTEM
    46.
    发明申请
    SLIDING WINDOW INTEGRATION SCHEME FOR OBJECT DETECTION IN A RADAR SYSTEM 审中-公开

    公开(公告)号：US20200150222A1

    公开(公告)日：2020-05-14

    申请号：US16188363

    申请日：2018-11-13

    Applicant: GM Global Technology Operations LLC

    Inventor： Oren Longman ,  Igal Bilik

    IPC: G01S7/35 ,  G01S13/58 ,  G01S13/72 ,  G01S13/93

    Abstract: A system and method to detect an object with a radar system involve transmitting two or more sets of linear frequency modulated signals with a gap duration Dg, during which there is no transmission, between each of the two or more sets of the linear frequency modulated signals. Each of the two or more sets of the linear frequency modulated signals defines a sub-frame, and two or more sub-frames defines a frame. The method includes receiving reflections resulting from the linear frequency modulated signals encountering one or more objects in a field of view of the radar system, and processing the reflections to identify the one or more objects. The processing includes performing an on-off Radon transform to correct a phase bias caused by the gap duration during which there is no transmission.

    MULTI-TARGET DETECTION IN CDMA RADAR SYSTEM
    47.
    发明申请
    MULTI-TARGET DETECTION IN CDMA RADAR SYSTEM 审中-公开

    公开(公告)号：US20200142049A1

    公开(公告)日：2020-05-07

    申请号：US16182847

    申请日：2018-11-07

    Applicant: GM Global Technology Operations LLC

    Inventor： Gaston Solodky ,  Shahar Villeval ,  Oren Longman ,  Igal Bilik

    IPC: G01S13/72 ,  G01S13/538 ,  G01S13/93 ,  G01S13/56

    Abstract: A system and method to perform multi-target detection in a code division multiple access (CDMA) radar system involve transmitting, from each transmitter among T transmitters, a transmitted signal with a different code, and receiving, at each receiver among one or more receivers, a received signal that includes reflections resulting from each of the transmitted signals with the different codes. The method includes processing the received signal at each of the one or more receivers by implementing T processing chains. Each of the T processing chains is iterative. The method also includes detecting an object at each completed iteration at each of the T processing chains, and subtracting a subtraction signal representing a contribution of the object to the received signal prior to subsequent iterations.

    Two-stage beamforming
    48.
    发明授权
    Two-stage beamforming 有权

    公开(公告)号：US10571557B2

    公开(公告)日：2020-02-25

    申请号：US15619933

    申请日：2017-06-12

    Applicant: GM Global Technology Operations LLC

    Inventor： Igal Bilik ,  Gonen Barkan ,  Shahar Villeval ,  Shmuel Nedjar ,  Ilya Shapir Poltorak

    IPC: G01S13/46 ,  G01S13/42 ,  G01S13/93 ,  G01S1/72 ,  G01S7/52 ,  G01S13/72 ,  G01S15/89 ,  H01Q3/26 ,  G01S13/931 ,  G01S13/02

    Abstract: A system and method to perform two-stage beamforming in a radar system includes obtaining an incoming signal vector x associated with a detected target. The method also includes performing coarse beamforming with a first set of k1 azimuthal angle θi and elevation angle φi combinations associated with each element of the vector, and selecting a selected area in an azimuth-elevation plane around a subset of the k1 azimuthal angle θi and elevation angle φi combinations for each element of the vector. Fine beamforming is performed in the selected area with a second set of k2 azimuthal angle θi and elevation angle φi combinations associated with each element of the vector. The second set of k2 azimuthal angle θi and elevation angle φi combinations is more closely spaced in the azimuth-elevation plane than the first set of k1 azimuthal angle θi and elevation angle φi combinations.

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