摘要
针对Alpha噪声环境下通常的数字信号调制识别的算法失效的问题,本文提出了一种方法:首先将被Alpha噪声污染的数字信号进行预处理,然后对处理之后的信号求循环谱,通过分析各信号循环谱的特征,提取出4个特征参数对信号进行识别。仿真结果表明,在Alpha噪声环境下,该方法可以实现对2PSK、QPSK、2/4FSK、MSK信号的识别,并且取得了较高的识别率,具有良好的性能。
To solve the problem that traditional digital signals modulation recognition methods are invalid in the Alpha stable distribution noise,this paper proposes a method： firstly,the digital signal which is polluted by Alpha noise is pre processed,and then calculating the cyclic spectrum of signal which is processed. By analyzing the characteristics of signals＇ cyclic spectrum,four characteristic parameters are extracted to recognize the modulated signals. Simulation results show this method can recognize the 2 /4PSK、2 /4FSK、MSK signals successfully,and this method achieves higher recogntion rates,it has good performance.
出处
《无线通信技术》
2016年第1期17-22,共6页
Wireless Communication Technology
关键词
Alpha噪声
预处理
循环谱
调制识别
特征参数
Alpha noise
pre process
cyclic spectrum
modulation recognition
characteristic parameter
