LabVIEW关于包络分析的说明,The envelope detection technique involves the following three steps: shifting the narrow band range in the high frequency band to the base band,
filtering the frequency-shifted signal using a lowpass filter, and calculating the envelope signal of the lowpass-filtered signal。现在不敢确定用hilbert法做包络谱是否与它一致,后两步肯定没问题,就是第一步好像有差异,虽然hilbert法效果也可以。