一是利用分段FFT的相位差修正算法，二是基于二次内插的频率FF T校正法。
One method is phase difference correction of partly FFT; the other is FFT frequency correction with quadratic interpolation.
一是利用分段FFT的相位差修正算法，二是基于二次内插的频率FF T校正法。
One method is phase difference correction of partly FFT; the other is FFT frequency correction with quadratic interpolation.
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