复高斯白噪声下基于多种方法的频率估计  

Estimation of Frequency Based on Several Methods in WGN

作　　者：邹建彬[1] 张炜[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《现代电子技术》2006年第17期1-3,6,共4页Modern Electronics Technique

摘　　要：对常用的几种频率估计方法进行了回顾,简单介绍了其中两种频率估计方法的原理;并应用最大似然、协方差、MUSIC、ESPRIT这几种方法对复高斯白噪声下信号的频率进行估计。给出了计算机仿真结果,并对各种方法估计结果进行了比较。比较结果表明:基于旋转不变的互谱估计方法(ESPRIT)避免了在固有的整个频域搜索,且能有效抑制噪声,具有良好频率估计性能。Several methods of frequency estimation are reviewed in this paper.Two of these methods are simply introduced, and methods to estimate the frequency of signal in WGN which include maximum likelihood method, modified covariance method, MUSIC method, ESPRIT method are showed. Computer simulations have been made in this paper and the results of these methods are compared. The compared results show ESPRIT method is effective in prohibiting white Gauss noise and has good performance without searching procedure.

关 键 词：MATLAB软件 复高斯白噪声 频率估计 功率谱 信噪比 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置] TP301.6[自动化与计算机技术—控制科学与工程]