用Fourier变换求取信号的功率谱---周期图法

用Fourier变换求取信号的功率谱---分段周期图法

用Fourier变换求取信号的功率谱---welch方法

功率谱估计----多窗口法（multitaper method ,MTM法）

功率谱估计----最大熵法（maxmum entmpy method,MEM法）

功率谱估计----多信号分类法（multiple signal classification,music法）Fourier transform to strike a signal to the power spectrum - the cycle of plans

Fourier transform to strike a signal to the power spectrum - Sub-cycle Method

Fourier transform to strike a signal to the power spectrum --- welch method

Power spectrum estimated more than window ---- Law (multitaper method, MTM)

---- Power spectrum estimate of maximum entropy (maxmum entmpy method, MEM)

---- More than the estimated power spectrum signal classification (multiple signal classification, music)