DISTANCE ASSESSMENT WITH HEADERLESS PACKETS
    4.
    发明公开

    公开(公告)号:US20240201361A1

    公开(公告)日:2024-06-20

    申请号:US18082393

    申请日:2022-12-15

    Applicant: NXP B.V.

    Abstract: Aspects of the present disclosure are directed to communicating data for authentication and location determination, such as for authenticating a key FOB and locating the key FOB within a defined distance. As may be implemented in accordance with one or more embodiments, a plurality of headerless packets, respectively including scrambled timestamp sequence (STS) packets but not including encoding and/or synchronization headers, are communicated between respective communication circuits. A time of flight (TOF) value indicative of time elapsed between transmission and reception of the plurality of headerless packets is assessed based on the STS packets. A distance between the communication circuits is determined based on the assessed time of flight.

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