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    • 5. 发明申请
    • WIRELESS COMMUNICATION DEVICE
    • 无线通信设备
    • US20060256844A1
    • 2006-11-16
    • US11381325
    • 2006-05-02
    • Yuichiro ShimizuYukitoshi Sanada
    • Yuichiro ShimizuYukitoshi Sanada
    • H04B1/00
    • H04B1/71637
    • A wireless communication device is provided. The wireless communication device executes digital processing for a received UWB signal with use of an A/D converter having an adequate sample rate and resolution, and thus can obtain precise reception timing information. Since the sample rate of an A/D converted output is high, a timing detection circuit is formed of two-stage matched filters. The former-stage chip matched filter calculates the correlation between an input signal and a template signal. When a correct transmission pulse signal has arrived, the chip matched filter outputs to a frame matched filter an indication as to the presence of a pulse and reception timing. The latter-stage frame matched filter calculates the correlation value between a received frame signal and a spreading code to thereby determine whether the received frame is correct or incorrect, and adequately changes a threshold value of the chip matched filter.
    • 提供无线通信设备。 无线通信装置利用具有足够的采样率和分辨率的A / D转换器对接收的UWB信号执行数字处理,从而可以获得精确的接收定时信息。 由于A / D转换输出的采样率高,因此定时检测电路由两级匹配滤波器形成。 前级芯片匹配滤波器计算输入信号和模板信号之间的相关性。 当一个正确的传输脉冲信号到达时,芯片匹配滤波器输出到一个帧匹配滤波器,指示是否存在一个脉冲和接收定时。 后级帧匹配滤波器计算接收帧信号和扩展码之间的相关值,从而确定接收帧是正确还是不正确,并适当地改变码片匹配滤波器的阈值。