A new simplified temporal-spatial maximum likelihood algorithm for DOA estimation

For the purpose of improving DOA estimation performance, we propose a new simplified temporal-spatial maximum likelihood algorithm. Instead of using discrete Fourier transform (DFT) filters, the proposed algorithm uses special Doppler filters to process the received data according to the signal´s Doppler frequency. The processed data are then used by the maximum likelihood algorithm to estimate DOA. Because the special Doppler filters can greatly reduce the influences between signals, the proposed algorithm works significantly better than the simplified temporal-spatial maximum likelihood algorithm. Computer simulation results are presented and demonstrate the merits of the proposed algorithm.