功率谱密度相关方法的matlab实现,基于Matlab功率谱密度估计方法

基于Matlab功率谱密度估计方法

摘要

在实际情况下, 许多平稳信号无法导出数学表达式, 要准确获取这些信号的功率谱密度存在一定的困难。根据维纳-辛钦 (Wiener Khintchine)定理,提出一种基于Matlab编程实现这类信号的功率谱密度的估计方法。通过仿真实验表明, 该方法简单易行,准确性较高。

关键词：平稳信号；功率谱密度；估计方法；

Estimation Method for Power Spectral Density of Stationary

Signals

Abstract

In practice m any mathematical expressions can no t be derived from stationary signals as there are: some difficulties in getting the power spectral density of the signals According to Wiener Khintchine theorem, the paper suggested an estimation method for power spectral density of the signals based on Matlab programming Simulation results show that the method is simple and comparatively accurate.iim. Keywords：Stationary signal; Power spectral density; estuation method;

前言

信号的功率谱密度在通信系统的设计、信号传输、信号分析及信号处理等方面有很重要的作用。频谱分析是信号在频率域上的重要手段，他反映了信号的频率成分以及分布情况。信号频谱估计是信号分析的重要手段，也是信号综合的前提