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本文针对数字信号经过传输后,到达接收点所出现的问题:信号处子噪声背景中并有明显的畸变,提出一种有效的提取其信息的方法。从锁相环的电特性入手,分析应用锁相环可获得大信噪比并适于对起伏信号提取其参量(信息)的原理。这种方法对数字信号处理中的信息提取有普遍适用的意义。文中并给出电路参数设计和应用结果。
In this paper, after the digital signal is transmitted, the problem that arrives at the receiving point is presented: there is obvious distortion in the background of signal noise, and an effective method of extracting its information is proposed. Starting from the electrical characteristics of phase-locked loop, the principle of obtaining large signal-to-noise ratio (SNR) and applying it to extract the parameters (information) of the fluctuating signal is analyzed. This method has general application significance to the information extraction in digital signal processing. In the paper, the circuit parameters design and application results are given.