Method for time-varying channel parameter estimation based on fractional Fourier transform

Time-varying fading channel greatly challenges the accurate channel estimation. This paper proposes a method for time-varying channel parameter estimation based on fractional Fourier transform. According to the channel parametric model, a multi-component LFM signal is sent to detect the channel. At the receiver, fractional Fourier transform is implemented to estimate the parameters of LFM signal and finally obtain the parameters of time-varying channel. Theoretical analysis and simulation results show that the proposed algorithm exhibits good performances and has a low computational complexity.