复杂噪声背景下正弦频率估计新方法  

New frequency estimation method for sinusoidal signal submerged in complicated noise

作　　者：王茂林 刘少伟 孙晓东[2] 

机构地区：[1]辽宁葫芦岛市92941部队 [2]吉林大学通信工程学院

出　　处：《吉林大学学报（工学版）》2009年第S2期371-375,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：吉林省自然科学基金项目(60172032)

摘　　要：提出一种基于系统参数摄动的单变量滤波驱动混沌同步的强混沌背景下正弦频率估计方法。该方法利用采样的混合信号通过低通滤波器并驱动构建的混沌响应系统,由于同步误差序列中混沌噪声影响大大减小且含有正弦信号,对误差序列采用互谱MUSIC算法估计正弦频率。该方法同样适用于强混沌信号加强白噪声为背景的正弦频率估计。A frequency estimation method was presented for weak sinusoidal signal embedded in chaotic 'noise' based on parameter variation chaotic synchronization which one filtered driving variable is used to drive response chaotic system.Because the error data series between drive and response signal has only little chaotic interference and has the sinusoidal signal.Using the cross-spectral MUSIC method to estimate the sinusoidal frequency in the error data.The method is suit for the situation where noises are mixture of strong chaotic noise and white noise.

关 键 词：混沌同步 参数摄动 互谱MUSIC算法 频率估计 

分 类 号：TM935.1[电气工程—电力电子与电力传动]