基于小波变换的MPSK信号符号率估计方法  

Wavelet Transform Based Symbol Rate Estimation of MPSK Signals

作　　者：秦永[1] 万国金[1] 谢芳娟[1] 

机构地区：[1]南昌大学电子信息工程系,江西南昌330031

出　　处：《通信技术》2009年第1期81-83,共3页Communications Technology

基　　金：国家自然科学基金资助项目(No.60762005)

摘　　要：通过对MPSK信号的小波域特征进行分析,研究了小波变换结合FFT估计MPSK信号的符号率的算法,比较了利用一次小波和二次小波变换估计信号符号率的性能。仿真结果表明,在相同情况下,利用MPSK信号的二次小波变换进行符号率估计比利用一次小波变换进行符号率估计的性能更为优越。在信噪比不小于5dB的情况下,利用信号的二次小波变换提取信号符号率的准确率能够达到98%以上。By analyzing the wavelet domain character of MPSK signals, the symbol rate estimation algorithms of MPSK signals in combination of wavelet transform with FFT is studied, and the performances of between two symbol rate estimation algorithms by using once the wavelet transform or twice the wavelet transform are compared. The simulation results show that the twice wavelet algorithm is superior to the once wavelet algorithm, and the precise extraction ratio of the signal symbol of MPSK signals in up to 98% on condition of RSN ≥ 5dB

关 键 词：MPSK 小波变换 符号率估计 FFT 

分 类 号：TN911.1[电子电信—通信与信息系统]