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数字信号相比模拟信号而言,具有许多优点,因此数字化信号处理得到了越来越普遍的运用,而幅度调制信号数字化处理也会得到更多的运用。对于幅度调制信号的数字化解调,目前最常用的是正交相干解调的方法。但是这种方法消耗资源较多,使用数字器件易引入误差。为此文中提出了一种包络解调算法,该算法简单实用,误差较小,具有较高的工程应用价值。
Compared with analog signals, digital signals have many advantages. Therefore, digital signal processing has been more and more widely used, and the digital processing of amplitude modulation signals will be more used. For digital demodulation of amplitude-modulated signals, the most commonly used method is quadrature coherent demodulation. However, this method consumes more resources, the use of digital devices easy to introduce errors. In this paper, an envelope demodulation algorithm is proposed. The algorithm is simple and practical with small error and high engineering application value.