FFT测量相位具体算法。下面的程序里Pn 存的就是基波相位 如果求的是谐波相位，稍微修改即可-FFT measurement phase specific algorithm. The following program Pn memory is fundamental phase, harmonic phase, a slight modification can be

快速傅里叶算法源代码，通过此算法可以快速提取某一信号的工频以及各次谐波-Fast Fourier algorithm source code, by this algorithm can quickly extract a signal frequency and each harmonic