信号傅里叶变换的matlab程序，包括对幅频和相频的图形绘制-Signal Fourier transform matlab program, including the magnitude and phase frequency of the graphics rendering

The Hilbert–Huang method is presented with modifications, for time-frequency analysis of distorted power quality signals. The empirical mode decomposition (EMD) is enhanced with masking signals based on fast Fourier transform (FFT), for separat

对已知的以为数据进行FFT变换，得到数据的频谱图，进而可分析出幅值和相角。-Known that the data FFT, the frequency spectrum of the data, which can be analyzed magnitude and phase angle.