A novel coherent integration algorithm for moving target

For better detection of weak moving target, a novel coherent integration algorithm is proposed in this paper. The received signal of each period is firstly transformed from fast-time domain to frequency domain. Then non-uniform fast Fourier transform (NUFFT) is utilized in slow-time domain to compensate the phase fluctuation entailed by range migration. Inverse fast Fourier transform (IFFT) in fast-time frequency domain is finally applied for the completion of integration. Compared with the existing coherent integration algorithms, the computational complexity of the proposed algorithm is much lower without loss of integration performance. Simulation results demonstrate the effectiveness of the proposed algorithm.