A PHASE COMPENSATION METHOD UNDER PICKET-FENCE EFFECT

The fence effect induces significant phase deviation in fast Fourier transform (FFT) spectrum analysis, which adversely impacts the accurate measurement of signal parameters. In this paper, we propose a phase compensation method based on modeling the characteristics of spectral leakage. This approach constructs a quantitative compensation model for frequency offset and phase error by analyzing the phase distribution of the main spectral lines. By integrating interpolation correction and optimizing the window function, our method effectively mitigates the phase distortion caused by the fence effect. Simulation experiments demonstrate that the phase error can be reduced to within 0.5° compared to traditional methods, making it suitable for high-precision signal processing applications.