中文说明：资源描述 该算法提供了两种包络解调的算法 第一种是hilbert变换后，做fft 第二种是平方后通过lpf，然后做fft
English Description：
Application backgroundThe algorithm provides two kinds of envelope demodulation algorithmThe first one is after the Hilbert transform, do FFTSecond is the square after the adoption of LPF, and then do FFT