Root-MUSIC with real-valued eigen-decomposition for coherent signals based on cross-correlation vector reconstruction
Zhenhua Ma · Jisuanji yingyong yanjiu · 2010
Real value of Root-MUSIC algorithm is a DOA(direction of arrival) estimation algorithm of high speed and high accuracy,but it could only estimate two coherent sources,the utilization efficiency of array is very low.To solve this problem,this paper proposed a new algorithm,by reconstructing the data model of the covariance matrix with cross-correlation vector,the new covariance matrix had a Toeplitz property.The new algorithm didn't require spatial smoothing,could estimate more coherent sources.Finally,numerical simulation results illustrated the efficiency and accuracy of the new method,the results show that under the same conditions,the original algorithm can only distinguish two coherent signals in an eight-element ULA,but the new algorithm can successfully estimate the DOA of four coherent sources.New algorithm provides a new approach for the DOA estimation in the field of multi-path environment.