Phase error in fast Fourier transform analysis

Abstract In this paper, by analysing a windowing signal with Fourier transform, the leakage-induced phase error is investigated, and the phase error distribution is indicated. Furthermore, a practical approach to correct leakage in a discrete frequency signal to obtain accurate phase information is presented based on an analytical method. The correction result is that the phase estimation error is reduced to within I degree in the given example. Some practical examples of this method are also presented.