摘要
在经典谱估计领域,由Welch提出的修正周期图法由于其简单,易于理解,便于计算等优点,获得了有效的应用,在多数情况下,其频率分辨率、估计方差能满足实际应用.运用MATLAB软件进行Welch算法仿真,并重点分析了窗函数对谱估计的影响.
In the field of classical chart, Welch put forward to amend periodic table, which is proved to be effective in appliance. Under many conditions, its frequency distinction and estimate variance can satisfy the practical appliance. This paper gives an example to simulate them with MATLAB, analyses these methods＇ performances and primarily analyzes the influence of window function.
出处
《北京工商大学学报（自然科学版）》
CAS
2007年第3期58-59,66,共3页
Journal of Beijing Technology and Business University:Natural Science Edition
基金
国家民委自然科学基金项目(MZZ04004)
关键词
功率谱估计
周期图
窗函数
分辨率
power spectrum estimation
periodic table
window function
resolution
