WANG Bu-hong, WANG Yong-liang, CHEN-Hui. A Novel Genetic Approach to DOA Estimation of Coherent Sources Based on Weighted Spatial Smoothing and Toeplitz Matrix Fitting[J]. Acta Electronica Sinica, 2003, 31(9): 1394-1397.
WANG Bu-hong, WANG Yong-liang, CHEN-Hui. A Novel Genetic Approach to DOA Estimation of Coherent Sources Based on Weighted Spatial Smoothing and Toeplitz Matrix Fitting[J]. Acta Electronica Sinica, 2003, 31(9): 1394-1397.DOI:
The optimal weighted spatial smoothing(WSS)technique proposed in[1]is capable of de-correlating the coherent sources perfectly
with the equivalent sources covariance matrix diagonal.Based on the fact that the optimal weight matrix in[1]is a function matrix of source directions and the array covariance matrix after optimal WSS is Toeplitz
a new cost function is constructed.The bearing estimates can then be achieved by virtue of a genetic-algorithm-based Toeplitz matrix fitting.Compared with[1]
the proposed algorithm can be realized without the a priori knowledge about source directions and de-noising preprocessing.The Monte-Carlo simulation results demonstrate that the new algorithm is highly superior to the conventional SS(spatial smoothing)technique in the resolving ability for spatially-closed coherent sources
especially in the case of small array size.Besides
the comparison of new methods with maximum-likelihood methods is also presented.