分析了该信号的时域、频域、倒谱，循环谱等,基于kaiser窗的双谱线插值FFT谐波分析，可以得到很精确的幅值、频率、相位估计。- Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. Dual-line interpolation FFT harmonic analysis kaiser windows, You can get a very accurate amplitude