An efficient 2-D DOA estimation algorithm for coherent signals
ZhengDong Tian, Jiashan Tang · 2016
For two-dimensional(2-D) direction-of-arrival(DOA) estimation of coherent signals, this paper proposes a new algorithm based on matrix reconstruction and polynomial rooting. Extracting the first column of the correlation matrix and constructing a new matrix by utilizing the conjugate symmetry property. The column rank of the new matrix is exactly equal to number of sources and has no relationship with sources' relevance. Constructing the polynomial with the new orthogonal matrix and then solving it to get the estimation. The new algorithm has low computational complexity and has higher performance than spatial smoothing, Toeplitz reconstruction algorithms, etc. Simulations demonstrate the validity of the proposed method.