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Angle resolution of fractional Fourier transform

The fractional Fourier transform has been proved to be one of the most competent tools for processing nonstationary signals, and thus become a very active area in signal processing community in recent years. The resolution ability for the angle parameter of the fractional Fourier transform is an important issue for analyzing and processing nonstationary signals, especially the chirp signals. In this paper, the resolution for the angle of the fractional Fourier transform is presented and the simulation experiment is provided to testify the validity of the derived results.