An access system for a vehicle includes a receiver and an access module. The receiver is configured to receive a signal transmitted from a portable access device to the vehicle. The access module is configured to generate a differentiated signal based on the received signal; up-sample the differentiated signal to generate a first up-sampled signal; obtain or generate an expected signal; up-sample the expected signal to generate a second up-sampled signal; cross-correlate the first up-sampled signal and the second up-sampled signal to generate a cross-correlation signal; based on the cross-correlation signal, determine a phase difference between the first up-sampled signal and the second up-sampled signal; determine a round trip time of the signal received by the receiver; and permit access to the vehicle based on the round trip time.

    一种用于车辆的访问系统,该系统包括接收器和访问模块。接收器被配置为接收从便携式访问设备发送到车辆的信号。访问模块被配置为:基于接收到的信号来生成微分信号;对微分信号进行上采样以生成第一上采样信号;获得或生成预期信号;对预期信号进行上采样以生成第二上采样信号;将第一上采样信号与第二上采样信号互相关以生成互相关信号;基于互相关信号,确定第一上采样信号与第二上采样信号之间的相位差;确定由接收器接收到的信号的往返时间;并且基于往返时间来许可对车辆的访问。


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    Titel :

    UP-SAMPLING AND CROSS-CORRELATION FOR TIME OF ARRIVAL DETERMINATIONS IN PASSIVE ENTRY/PASSIVE START SYSTEMS


    Weitere Titelangaben:

    被动进入/被动启动系统中的到达时间确定的上采样和互相关


    Beteiligte:

    Erscheinungsdatum :

    2021-11-05


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

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



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