Closed form parameters estimation for near field sources

Two novel algorithms are proposed for ranges and direction-of-arrivals (DOAs) estimation of the narrow-band near field sources. By exploiting the time-domain and space-domain correlations of impinging signals jointly, we can estimate 2p independent sources with a uniformly linear array (ULA) of 2p + 1 elements, being double of the conventional methods. In our methods, the peak search and pairing operations, needed in most algorithms for near field sources, can be omitted completely. Simulation results show that our two ESPRIT-based methods provide the improved performance over conventional ones based on the second-order statistics.