A system for includes master and sniffer devices. The master device includes: first antennas with different polarized axes; a transmitter transmitting a challenge signal via the first antennas from the vehicle to a slave device, where the slave device is a portable access device; and a receiver receiving a response signal in response to the challenge signal from the slave device. The sniffer device includes: second antennas with different polarized axes; and a receiver receiving, via the second antennas, the challenge signal from the transmitter and the response signal from the slave device. The sniffer device measures when the challenge signal and the response signal arrive at the sniffer device to provide arrival times. The master or sniffer device estimates at least one of a distance from the vehicle to the slave device or a location of the slave device relative to the vehicle based on the arrival times.


    Access

    Download


    Export, share and cite



    Title :

    PASSIVE ENTRY/PASSIVE START ACCESS SYSTEMS INCLUDING ROUND TRIP TIME SNIFFING


    Contributors:

    Publication date :

    2021-06-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G07C TIME OR ATTENDANCE REGISTERS , Zeit- oder Anwesenheitskontrollgeräte / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01S RADIO DIRECTION-FINDING , Funkpeilung / H01Q Antennen , ANTENNAS, i.e. RADIO AERIALS / H04B TRANSMISSION , Übertragung / H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze



    Passive entry/passive start access systems including round trip time sniffing

    STITT RAYMOND MICHAEL / TOKUNAGA YUKI | European Patent Office | 2021

    Free access

    PASSIVE ENTRY/PASSIVE START ACCESS SYSTEMS INCLUDING ROUND TRIP TIME SNIFFING

    STITT RAYMOND MICHAEL / TOKUNAGA YUKI | European Patent Office | 2020

    Free access

    Passive entry/passive start access systems including round trip time sniffing

    STITT RAYMOND MICHAEL / TOKUNAGA YUKI | European Patent Office | 2023

    Free access

    Passive Entry/Passive Start Access Systems Including Round Trip Time Sniffing

    STITT RAYMOND MICHAEL / TOKUNAGA YUKI | European Patent Office | 2024

    Free access

    Passive entry/passive start access systems with tone exchange sniffing

    STITT RAYMOND MICHAEL / TOKUNAGA YUKI | European Patent Office | 2021

    Free access