理解随机信号功率谱分析原理和方法。

(1) 生成信号，被淹没在在噪声中；

(2) 试用周期图法估计信号的功率谱；

(3) 选用不同窗，使用修正周期图法估计信号的功率谱；

(4) 对一段语音信号，使用LD算法估计其功率谱；

(5) 详细列出功率谱估计的步骤和原理。

-understanding of random signal power spectrum analysis principles and methods. (1) generate signals being drowned in the noise; (2) The probationary period plan estimates the signal power spectrum; (3), different windows, the use of map amendment cycle method to estimate the power spectrum signal; (4) a voice signal, the use of LD algorithm to estimate the gong spectrum; (5) a detailed breakdown of the power spectrum estimation steps and principle.