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    Geolocation of radio frequency devices using spaceborne phased arrays
    5.
    发明授权
    Geolocation of radio frequency devices using spaceborne phased arrays 有权

    公开(公告)号：US11750275B2

    公开(公告)日：2023-09-05

    申请号：US17575087

    申请日：2022-01-13

    申请人： AST & Science, LLC

    发明人： Raymond J. Sedwick ,  Abel Avellan

    IPC分类号： H04B7/185 ,  H04B7/024 ,  H04W84/06

    CPC分类号： H04B7/18513 ,  H04B7/024 ,  H04B7/1855 ,  H04W84/06

    摘要： A communication system has a phased antenna array configured to communicate via a plurality of beams with a wireless device, such as user equipment (e.g., a smart phone). The plurality of beams define a field of view of the phased antenna array, the field of view having a plurality of cells and each of the plurality of beams is associated with one of the plurality of cells within the field of view. A processing device detects the wireless device within the field of view and determines a coarse geographic location of the wireless device within the field of view of the wireless device when the wireless device is within the field of view, or within a cell. The system further determines a fine geographic location for the wireless device based on frequency offset (due to Doppler) and signal flight time.

    Satcom GSM solution directly communicate with GSM phones
    6.
    发明授权
    Satcom GSM solution directly communicate with GSM phones 有权

    公开(公告)号：US11463159B2

    公开(公告)日：2022-10-04

    申请号：US17666234

    申请日：2022-02-07

    申请人： AST & Science, LLC

    发明人： Zhi Zhong Yu ,  Federico Pedro Fawzi ,  Abel Avellan

    IPC分类号： H04B7/185 ,  H04B7/01

    摘要： A GSM satellite communication system is in communication with a first satellite having a first field of view including a first plurality of cells in which a plurality of active User Equipment (UEs) are located. The plurality of active UEs are in direct communication with the first satellite. The satellite communication system includes a first feeder link and a first tracking antenna configured to communicate with the plurality of active UEs via the first satellite directly serving the first plurality of cells; a first processing device configured to communicate with the plurality of active UEs; and a second processing device configured to normalize delay for a plurality of beam centers of the first plurality of cells, and provide the normalized delay to the first processing device.