Estimation Algorithm of Two-Dimensional Direction of Arrival Based on L-shape Array of Distributed Source
Xin Song · Journal of Northeastern University · 2008
To estimate the 2D DOA(direction of arrival) of local scattered signals,a novel algorithm is suggested on the basis of L-shape array of coherently distributed source by way of reducing the steering vectors from coherently distributed source in form of integral to the Schur-Hadamard product of the steering vector from point source and real vector.Then,taking advantage of the array configuration to estimate the elevation angle,the azimuth angle is estimated using the second-order statistics based on Schur-Hadamard product.But the proposed second-order statistics is insensitive to white noise,so the SNR performance is improved.By the new algorithm the 2D-DOF joint operation is reduced to a two-step one-dimensional estimation problem,so as to reduce efficiently the computation.Simulation test shows its validity.