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数字信号调制方式的识别是近年来迅速发展起来的一门新技术,它是信号分析领域的重要组成部分。调制识别技术具有很高的实用价值。在军用和民用方面都有重要应用,如通过调制识别技术查清相关信号的参数和性质。这里针对短波信道条件下的MPSK信号调制识别问题,研究了一种基于功率谱和谱相关为特征的调制方式的分类与识别方案。该方案中提取了以信号功率谱的各种特征为主要的特征参数,通过对BPSK、QPSK、8PSK几种常用的数字信号进行仿真识别表明,该方法简单便于工程实现,具有很好的实用性。
The identification of digital signal modulation is a new technology developed rapidly in recent years. It is an important part of signal analysis. Modulation identification technology has a high practical value. In military and civilian aspects have important applications, such as modulation recognition technology to identify the parameters and nature of the signal. In this paper, aiming at the problem of MPSK signal modulation recognition under short-wave channel, a scheme of classification and identification based on power spectrum and spectral correlation is proposed. In this scheme, various characteristics of the signal power spectrum are extracted as the main characteristic parameters. Several commonly used digital signals of BPSK, QPSK and 8PSK are simulated and identified, which shows that the method is simple and easy to implement and has good practicability .