2D DOA estimation for coherently distributed source

In this paper, a novel two-dimensional direction of arrival (2D DOA) estimation method is proposed when coherently distributed source exists. The second-order statistics is formed to estimate the azimuth DOA with integral steering vector expressed as Schur-Hadamard product. And then the elevation DOA is estimated using advantage of the array configuration based on the eigenstructure between the steering matrix and the signal subspace of distributed sources. It has a lower computational complexity without any joint two-dimensional searching. Simulations results are included to demonstrate the performance of the proposed technique.