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    • 9. 发明申请
    • WIRELESS COMMUNICATION TERMINALS AND METHODS USING ACOUSTIC RANGING SYNCHRONIZED TO RF COMMUNICATION SIGNALS
    • 无线通信终端和使用与射频通信信号同步的声学范围的方法
    • WO2009112901A1
    • 2009-09-17
    • PCT/IB2008/053729
    • 2008-09-15
    • SONY ERICSSON MOBILE COMMUNICATIONSHAARTSEN, JacobusBENGTSSON, Henrik Sven
    • HAARTSEN, JacobusBENGTSSON, Henrik Sven
    • H04L7/00G01S5/22H04B1/38
    • H04L7/0008G01S5/00G01S11/16H04B1/3805
    • Wireless communication terminals and methods are disclosed that determine acoustic ranging synchronized to RF communication signals. A communication terminal can include a RF transceiver, a microphone, and a controller. The controller synchronizes a clock in response to known timing characteristics of received RF communication signals. The controller determines an acoustic signal generation time relative to the RF communication signal synchronized clock at which the other communication terminal will generate an acoustic signal. The controller determines an acoustic signal receipt time relative to the RF signal synchronized clock when the acoustic signal from the other communication terminal is detected in the microphone signal. The controller further determines a propagation time of the acoustic signal from the other communication terminal to the microphone based on a difference between the acoustic signal generation time and the acoustic signal receipt time, and determines a range to the other communication terminal in response to the propagation time of the acoustic signal.
    • 公开了确定与RF通信信号同步的声学测距的无线通信终端和方法。 通信终端可以包括RF收发器,麦克风和控制器。 控制器响应于接收的RF通信信号的已知定时特性来同步时钟。 控制器确定相对于另一通信终端将产生声信号的RF通信信号同步时钟的声信号产生时间。 当在麦克风信号中检测到来自另一通信终端的声信号时,控制器确定相对于RF信号同步时钟的声信号接收时间。 控制器还基于声信号产生时间和声信号接收时间之间的差,确定来自另一个通信终端的声信号的传播时间,并且响应于传播确定到另一个通信终端的范围 声信号的时间。