摘要
提出一种小波变换与自相关结合的数字调制信号识别方法,先采用Haar小波对QAM、PSK和FSK信号分别进行离散小波变换,然后针对3种信号小波变换结果的特性分别求出它们的自相关函数,选取合适的门限对3种信号加以识别。该方法计算量少,信号功率对识别性能影响小,计算机仿真结果表明其快捷、有效。
An identification method of digital modulation types is proposed, which is based on wavelet transform and auto-correlation. In this paper the method of discrete wavelet transform had been applied to identify the three digital modulation types of 16QAM, PSK and FSK signals, where Haar wavelet had been used, which detected the input signals according the auto-correlation of the wavelet transform . It can reduce the identification error caused by the signal power with low computational complexity. The computer simulation results confirm its swiftness and efficient performance..
出处
《杭州电子工业学院学报》
2004年第1期68-71,共4页
Journal of Hangzhou Institute of Electronic Engineering
