先对信号进行希尔伯特黄变换，可求解Hilbert变换后的包络谱(Hilbert envelope spectrum can be solved)

将调制信号通过Hilbert变换，解调出低频信号(Demodulating the low frequency signal through the modulation signal through the Hilbert transform)

MATLAB希尔伯特Hilbert变换求包络谱 源程序代码(MATLAB Hilbert Hilbert transform for envelope source code)

Hilbert谱表示的是信号幅值在整个频率段上随时间和频率的变化规律，下面将分享完整的希尔伯特谱代码。(Hilbert spectrum represents the change rule of signal amplitude with time and frequency in the whole frequency band. The complete Hilbert spectrum code will be Shared below.)