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    • 6. 发明授权
    • Direct-sequence spread-spectrum communication system
    • 直接序列扩频通信系统
    • US5689525A
    • 1997-11-18
    • US511271
    • 1995-08-04
    • Minako TakeishiKen IkedaKenichi Takahashi
    • Minako TakeishiKen IkedaKenichi Takahashi
    • H04B1/707H04B1/7073H04K1/00
    • H04B1/707H04B1/709
    • A clock signal generator produces a basic clock signal. A variable delay device is operative for delaying the basic clock signal by an adjustable interval and thereby converting the basic clock signal into a delay-resultant clock signal. A pseudo-noise code is generated at a timing depending on the delay-resultant clock signal. A spread-spectrum information signal is despread into a non-spread information signal in response to the pseudo-noise code. A correlator detects a correlation between the spread-spectrum information signal and the pseudo-noise code. The adjustable interval provided by the variable delay device is controlled in response to the detected correlation to provide synchronization between the spread-spectrum information signal and the pseudo-noise code.
    • 时钟信号发生器产生基本时钟信号。 可变延迟装置用于将基本时钟信号延迟可调间隔,从而将基本时钟信号转换成延迟结果时钟信号。 在根据延迟结果时钟信号的定时产生伪噪声码。 响应于伪噪声码,扩频信息信号被解扩展成非扩展信息信号。 相关器检测扩频信息信号和伪噪声码之间的相关性。 响应于检测到的相关性来控制可变延迟装置提供的可调节间隔,以提供扩频信息信号和伪噪声码之间的同步。