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    System and method for ultra-high-resolution ranging using RFID
    1.
    发明授权
    System and method for ultra-high-resolution ranging using RFID 有权

    公开(公告)号：US11914018B2

    公开(公告)日：2024-02-27

    申请号：US17900480

    申请日：2022-08-31

    申请人： Cornell University

    发明人： Xiaonan Hui ,  Edwin C. Kan

    IPC分类号： G01S1/30 ,  G01S1/04 ,  G01S1/02 ,  G01S13/84 ,  G01S13/75

    CPC分类号： G01S1/306 ,  G01S1/022 ,  G01S1/0428 ,  G01S13/84 ,  G01S13/751

    摘要： A radio-frequency method for range finding includes modulating a reference signal having an intermediate frequency to a downlink signal having a carrier frequency using a clock signal. The downlink signal is transmitted to a tag using a transceiver. An uplink signal backscattered front the tag is received and demodulated using the clock signal. The uplink signal has a frequency that is a harmonic of the carrier frequency. A distance between the tag and the transceiver is calculated based on a phase of the demodulated uplink signal. A system for range finding includes a transceiver and a processor. The transceiver modulates a reference signal to downlink signal and transmits the downlink signal. The transceiver receives and demodulates an uplink signal. The processor is configured to receive the demodulated uplink signal and calculate a distance between the tag and the transceiver using a phase of the demodulated uplink signal.

    Phase correcting apparatus and method of transmission signal of vehicle radar, and vehicle radar apparatus with the same
    3.
    发明授权
    Phase correcting apparatus and method of transmission signal of vehicle radar, and vehicle radar apparatus with the same 有权

    公开(公告)号：US11802960B2

    公开(公告)日：2023-10-31

    申请号：US17187614

    申请日：2021-02-26

    申请人： HL KLemove Corp.

    发明人： Kyung Jin You

    IPC分类号： G01S13/931 ,  G01S13/84 ,  G01S7/02

    CPC分类号： G01S13/931 ,  G01S13/84 ,  G01S7/027 ,  G01S2013/9316 ,  G01S2013/93272

    摘要： The present disclosure relates to a phase correcting apparatus and method of the transmission signal of the vehicle radar apparatus and vehicle radar apparatus with the same. The present embodiments may provide, in the vehicle radar apparatus including the plurality of transmission channels for simultaneously transmitting transmission signals, the phase correcting apparatus and the vehicle radar apparatus for determining the phase adjustment value at the first transmission time based on a source transmission signal applied to the phase shifter included in each transmission channel and a distortion transmission signal extracted from the coupler included in each transmission channel, and compensating the phase of the target detection transmission signal transmitted at a subsequent second transmission time point based on the phase adjustment value. According to the present embodiments, it is possible to improve the quality of the radar reception signal and increase the accuracy of the target information.

    COMMUNICATION APPARATUS AND DISTANCE GENERATION METHOD THEREOF
    6.
    发明公开
    COMMUNICATION APPARATUS AND DISTANCE GENERATION METHOD THEREOF 审中-公开

    公开(公告)号：US20230236308A1

    公开(公告)日：2023-07-27

    申请号：US18009200

    申请日：2021-03-18

    申请人： Sony Semiconductor Solutions Corporation

    发明人： Hiroaki Nakano ,  Toru Terashima ,  Takuya Ichihara

    IPC分类号： G01S13/84 ,  G01S13/36

    CPC分类号： G01S13/84 ,  G01S13/36

    摘要： When measuring a distance between communication apparatuses, influence by a frequency offset between communication apparatuses is suppressed.
    A communication apparatus includes a frequency offset acquisition unit, a time acquisition unit, a phase acquisition unit, and a distance generation unit. The frequency offset acquisition unit acquires a frequency offset between frequencies used for transmission/reception by respective ones of the communication apparatuses. The time acquisition unit acquires transmission/reception time between the communication apparatuses. The phase acquisition unit acquires a phase relationship between frequencies used for transmission/reception. The distance generation unit generates distance information on the basis of the phase relationship.

    SYSTEM AND METHOD FOR ULTRA-HIGH-RESOLUTION RANGING USING RFID
    8.
    发明申请
    SYSTEM AND METHOD FOR ULTRA-HIGH-RESOLUTION RANGING USING RFID 有权

    公开(公告)号：US20220413082A1

    公开(公告)日：2022-12-29

    申请号：US17900480

    申请日：2022-08-31

    申请人： Cornell University

    发明人： Xiaonan Hui ,  Edwin C. Kan

    IPC分类号： G01S1/30 ,  G01S1/04 ,  G01S1/02 ,  G01S13/84

    摘要： A radio-frequency method for range finding includes modulating a reference signal having an intermediate frequency to a downlink signal having a carrier frequency using a clock signal. The downlink signal is transmitted to a tag using a transceiver. An uplink signal backscattered front the tag is received and demodulated using the clock signal. The uplink signal has a frequency that is a harmonic of the carrier frequency. A distance between the tag and the transceiver is calculated based on a phase of the demodulated uplink signal. A system for range finding includes a transceiver and a processor. The transceiver modulates a reference signal to downlink signal and transmits the downlink signal. The transceiver receives and demodulates an uplink signal. The processor is configured to receive the demodulated uplink signal and calculate a distance between the tag and the transceiver using a phase of the demodulated uplink signal.

    Radio frequency ranging using phase difference
    9.
    发明授权
    Radio frequency ranging using phase difference 有权

    公开(公告)号：US11513209B2

    公开(公告)日：2022-11-29

    申请号：US17047016

    申请日：2019-04-11

    申请人： Analog Devices, Inc.

    发明人： Tao Yu

    IPC分类号： G01S13/84 ,  G01S7/35 ,  H04J3/06 ,  H04L7/033

    摘要： Embodiments of the present disclosure describe mechanisms for radio frequency (RF) ranging between pairs of radio units based on radio signals exchanged between units. An exemplary radio system may include a first radio unit, configured to transmit a first radio signal, and a second radio unit configured to receive the first radio signal, adjust a reference clock signal of the second radio unit based on the first radio signal, and transmit a second radio signal generated based on the adjusted reference clock signal. Such a radio system may further include a processing unit for determining a distance between the first and second radio units based on a phase difference between the first radio signal as transmitted by the first radio unit and the second radio signal as received at the first radio unit. Disclosed mechanisms may enable accurate RF ranging using low-cost, low-power radio units.