High-speed target detection based on short-time Fourier transform and sequence reversing transform

This letter addresses the coherent integration problem for detecting high-speed target. A fast coherent integration method based on the short-time Fourier transform (STFT) and sequence reversing transform (SRT), that is, STFT-SRT, is proposed. In this method, STFT is first employed to obtain the velocity and improve the SNR without additional calculation. After that, SRT is presented to remove range migration (RM). Finally, the Fourier transform (FT) is conducted to achieve the coherent integration. The proposed algorithm can be easily implemented by using complex multiplications and the fast FT (FFT). Both simulated and real data results demonstrate the effectiveness of the proposed algorithm.