色噪声背景下正弦频率估计的互高阶谱LS方法  

Frequencies Estimation of Sinusoidal Embedded in Colored Noises via Cross-High-Order Cumulant LS Method

作　　者：马彦[1] 石要武[1] 戴逸松[1] 

机构地区：[1]吉林工业大学信息学院,长春130025

出　　处：《系统工程与电子技术》2001年第5期41-43,50,共4页Systems Engineering and Electronics

基　　金：国家自然科学基金资助课题! (F0 10 2 0 2 -69870 2 12 )

摘　　要：在互功率谱估计方法和高阶统计量理论相结合的基础上 ,提出了现代互高阶谱估计理论。首先推导并建立了基于互四阶累积量的Yule -Walker方程 ,并在此基础上提出了互四阶累积量的最小二乘 (LS)修正Yule -Walker方程方法。仿真结果表明 ,在混合色噪声背景下 ,在信噪比达到 - 5dB的情况下 ,该方法仍能有效地抑制相关的和不相关的色噪声 ,具有良好的频率估计性能。Harmonic retrieval problem considered here concerns with the estimation of the sinusoidal frequencies in hybrid col - red noises. It is applied to the cross - spectral theory and high - order self - spectral theory now. In this paper, Yule - Walker equation based on cross - fourth - order cumulant is developed first. And least square (LS) modified Yule - Walker (LS - Yule - Walker) method is also provided. Simulation results show that the method is effective to estimation sinusoid signal frequencies from hybrid colored noises and has good performance.

关 键 词：信号处理 噪声干扰 功率谱 色噪声 信号估计 正弦频率估计 高阶谱 

分 类 号：TN911.23[电子电信—通信与信息系统]