Spectral estimation is an important part of digital signal processing.This paper studied the basic period diagram method,and realized some improved methods on Matlab.%功率谱估计是数字信号处理的重要研究内容之一。对目前用得较多且最具代表性的周期图法进行研究,并针对它谱分辨率比较低等缺点,利用Matlab实现了几种改进的周期图法。
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