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    MULTI-TARGET DETECTION IN CDMA RADAR SYSTEM
    31.
    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
    32.
    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.

    Road clutter mitigation
    35.
    发明授权
    Road clutter mitigation 有权

    公开(公告)号：US10444341B2

    公开(公告)日：2019-10-15

    申请号：US15450532

    申请日：2017-03-06

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Igal Bilik ,  Shahar Villeval ,  Shmuel Nedjar ,  Alexander Pokrass

    IPC: G01S13/70 ,  G01S7/40 ,  G01S13/93 ,  G01S7/41 ,  G01S13/66

    Abstract: A method and radar system and vehicle that tracks an object is disclosed. A source signal is transmitted into a volume that includes the object. A reflected signal is received from the volume in response to the source signal. The reflected signal includes a reflection of the source signal from the object. A range is determined for the object from the reflected signal. A ground signal is estimated at the determined range and an amount of the ground signal in the reflected signal is estimated. The object is selected for tracking based on the estimate of the amount of the ground signal in the reflection from the object.

    THREE-DIMENSIONAL ALIGNMENT OF RADAR AND CAMERA SENSORS
    36.
    发明申请
    THREE-DIMENSIONAL ALIGNMENT OF RADAR AND CAMERA SENSORS 审中-公开

    公开(公告)号：US20190120934A1

    公开(公告)日：2019-04-25

    申请号：US15788048

    申请日：2017-10-19

    Applicant: GM Global Technology Operations LLC

    Inventor： Michael Slutsky ,  Daniel I. Dobkin ,  Shahar Villeval ,  Igal Bilik

    IPC: G01S7/40 ,  G01S13/86 ,  G06T7/73 ,  G06T7/33

    Abstract: A system and method to perform a three-dimensional alignment of a radar and a camera with an area of overlapping fields of view position a corner reflector within the area. The method includes obtaining sensor data for the corner reflector with the radar and the camera, and iteratively repositioning the corner reflector within the area and repeating the obtaining the sensor data. A rotation matrix and a translation vector are determined that align the radar and the camera such that a three-dimensional detection by the radar projects to a location on a two-dimensional image obtained by the camera according to the rotation matrix and the translation vector.

    TARGET TRACKING USING REGION COVARIANCE
    38.
    发明申请
    TARGET TRACKING USING REGION COVARIANCE 审中-公开

    公开(公告)号：US20180275265A1

    公开(公告)日：2018-09-27

    申请号：US15467465

    申请日：2017-03-23

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Igal Bilik ,  Ishai Eljarat ,  Shahar Villeval

    IPC: G01S13/72 ,  G01S13/93

    CPC classification number: G01S13/723 ,  G01S13/931

    Abstract: A vehicle, system and method for tracking an object with respect to the vehicle. A radar system receives a first plurality of detections from an object during a first time frame and a second plurality of detection during a second time frame. A region covariance matrix is calculated for a cluster formed from the first plurality of detections. An updated covariance matrix for the cluster is calculated from the region covariance matrix of the first time frame. A region covariance matrix is calculated for each of a plurality of clusters formed from the second plurality of detections. A metric is determined between the updated covariance matrix and each region covariance matrix from the second time frame. The object is tracked by associating the region covariance matrix from the second time frame having the smallest metric to the region covariance matrix of the first time frame.

    ADAPTIVE PROCESS NOISE DESCRIPTION FOR IMPROVED KALMAN FILTER TARGET TRACKING
    39.
    发明申请
    ADAPTIVE PROCESS NOISE DESCRIPTION FOR IMPROVED KALMAN FILTER TARGET TRACKING 审中-公开

    公开(公告)号：US20180252804A1

    公开(公告)日：2018-09-06

    申请号：US15447376

    申请日：2017-03-02

    Applicant: GM Global Technology Operations LLC

    Inventor： Ishai Eljarat ,  Igal Bilik ,  Shahar Villeval

    IPC: G01S13/72 ,  G01S13/93

    Abstract: A system and method to perform target tracking with a radar system that uses a Kalman filter include predicting a predicted target position of a target detected by the radar system in a frame. The frame is a period of time to transmit from every transmit element of the radar system in turn and receive the reflections from a range of the target. The method also includes determining an actual target positon of the target detected by the radar system based on reflections received by the radar system for the frame, and computing a process noise covariance matrix Q for a next frame, immediately following the frame, based on the predicted target position and the actual target position. Predicting a position of the target in the next frame is based on the process noise covariance matrix Q.

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