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    • 5. 发明授权
    • Apparatus and method for synchronization of direct sequence CDMA signals
    • 直接序列CDMA信号同步的装置和方法
    • US5872808A
    • 1999-02-16
    • US564007
    • 1995-11-29
    • Sorin DavidoviciEmmanuel Kanterakis
    • Sorin DavidoviciEmmanuel Kanterakis
    • H04B1/708H04B1/7093H04B7/005H04B1/69
    • H04W52/221H04B1/7093H04W52/226H04W52/228H04B1/708H04W52/24
    • A spread-spectrum-matched-filter apparatus including a code generator, an in-phase-symbol-matched filter, a quadrature-phase-symbol-matched filter, an in-phase-frame-matched filter, a quadrature-phase-frame-matched filter, and a controller. The code generator generates replicas of a chip-sequence signal, which are used to set the symbol-impulse responses of the inphase-symbol-matched filter and the quadrature-phase-symbol matched filter. The in-phase-frame-matched filter and the quadrature-phase-frame-matched filter detect a despread-header-symbol-sequence signal and generate a maximum output signal which may be used as a data-start signal or for synchronizing the timing of the controller as to when to trigger sampling of the A/D converter, the output of the symbol-matched filters, detection of the data-symbol-sequence signal and other time-dependent processes.
    • 一种扩频匹配滤波器装置,包括码发生器,同相符号匹配滤波器,正交相位符号匹配滤波器,同相帧匹配滤波器,正交相位帧 匹配的过滤器和控制器。 代码生成器生成芯片序列信号的副本,其用于设置同相符号匹配滤波器和正交相位符号匹配滤波器的符号脉冲响应。 同相帧匹配滤波器和正交相位帧匹配滤波器检测去扩展标题符号序列信号,并产生最大输出信号,其可以用作数据启动信号或同步定时 控制器何时触发A / D转换器的采样,符号匹配滤波器的输出,数据符号序列信号的检测和其他时间依赖过程。