A High Resolution Spatial Smoothing Algorithm

A high resolution spatial smoothing algorithm which takes cross correlation to the autocorrelation matrixes of subarray output is proposed to increase the angular resolution of conventional spatial smoothing techniques. The formula for the algorithm is derived, and the performance of the algorithm is also analyzed. Simulation results demonstrate that the improved algorithm possesses a better resolving ability and a lower SNR threshold than the conventional spatial smoothing technique and the subarray cross correlation spatial smoothing technique for DOA estimation of coherent signals.