摘要
研究了welch谱估计方法中窗函数和窗长度及FFT点数对谱估计结果的影响,应用Matlab中的Pwelch函数,作了仿真分析。根据分析结果,提出了有关窗函数、窗长度和FFT点数确定问题的建议。
Studied the influence of type of window function and length of window and length of FFT on results of spectrum estmation by simulating in Matlab using Pwelch function.And according to the results of simulation,present some advices on selection of window function,length of window,and length of FFT in Welch estimation of PSD.
出处
《环境技术》
2009年第5期23-27,共5页
Environmental Technology
