中文说明：
根据采集的时域数据，做fft得到其频谱，并计算其功率谱密度。
English Description：
According to the collected time-domain data, FFT is done to get its spectrum and calculate its power spectral density
According to the collected time-domain data, FFT is done to get its spectrum and calculate its power
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中文说明：
根据采集的时域数据，做fft得到其频谱，并计算其功率谱密度。
English Description：
According to the collected time-domain data, FFT is done to get its spectrum and calculate its power spectral density
data.xlsx
cal_psd.m