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    • 62. 发明申请
    • MULTIPLE TRANSCEIVER SYNCHRONOUS COMMUNICATION SYSTEM
    • 多收发器同步通信系统
    • US20090224876A1
    • 2009-09-10
    • US12043732
    • 2008-03-06
    • Clark E. McCallDavid T. ProefkeWilliam A. Biondo
    • Clark E. McCallDavid T. ProefkeWilliam A. Biondo
    • B60R25/00H04B1/16H04Q7/18
    • G07C9/00309B60R25/2009B60R25/24B60R25/403G07C2009/00587G07C2009/00793
    • A vehicle transceiver module is provided for use in a synchronous communication system including the vehicle transceiver module and one or more key fobs, each of the key fobs including a key fob transceiver for transmitting and receiving signals. The vehicle transceiver module includes transceiver circuitry, a controller, a storage device and power control circuitry. The transceiver circuitry receives the signal transmitted by the key fob transceiver and provides it to the controller. The controller is coupled to the transceiver for determining an offset value associated with one of the key fobs in response to an offset time duration between a reception time of the signal from the key fob and a first expected reception time of the signal from the key fob. The storage device is coupled to the controller for receiving the offset value associated with the key fob from the controller and stores the offset value along with information identifying the key fob. The power control circuitry is coupled to the transceiver circuitry for providing operational power thereto. In addition, the controller is also coupled to the power control circuitry and provides a begin transmission signal thereto to power up the transceiver circuitry for transmission of a signal to the key fob at a transmission start time determined by the controller in response to the offset value associated with the key fob and a second expected reception time.
    • 提供了一种车载收发器模块,用于包括车辆收发器模块和一个或多个密钥卡的同步通信系统中,每个密钥卡包括用于发送和接收信号的密钥收发信机。 车载收发器模块包括收发器电路,控制器,存储装置和功率控制电路。 收发器电路接收由密钥收发机发送的信号并将其提供给控制器。 控制器耦合到收发器,用于响应于来自密钥卡的信号的接收时间与来自密钥卡的信号的第一预期接收时间之间的偏移持续时间来确定与密钥卡之一相关联的偏移值 。 存储设备耦合到控制器,用于从控制器接收与密钥卡相关联的偏移值,并存储偏移值以及识别密钥卡的信息。 功率控制电路耦合到收发器电路以向其提供操作功率。 此外,控制器还耦合到功率控制电路并提供其开始发送信号,以便在收发器电路上加电,以在由控制器响应于偏移值确定的传输开始时间将信号发送到钥匙卡 与钥匙扣相关联和第二预期接收时间。