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Progress In Electromagnetics Research Letters
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By M. Omer, N. Tayem, and A. A. Hussain

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This paper presents a novel method for the two-dimensional direction of arrival (DOA) estimation based on QR decomposition. A configuration with two uniform linear antenna arrays (ULA) is employed for the joint estimation of elevation (θ) and azimuth (φ) angles. Q data matrix will estimate the azimuth angle while R data matrix will estimate the elevation angle. The proposed method utilizes only a single snapshot of the received data and constructs a Toeplitz data matrix. This reduces the computational complexity of the proposed method to O((N+1)2) from O(N3) for SVD based methods. The structure of the data matrix also favors the 2D DOA estimation for both coherent and non-coherent source signals. Simulation results are presented, and performance of the proposed method is compared with the Matrix Pencil method for 2D DOA estimation of multiple incident source signals.

M. Omer, N. Tayem, and A. A. Hussain, "Two Uniform Linear Arrays for Non-Coherent and Coherent Sources for Two Dimensional Source Localization," Progress In Electromagnetics Research Letters, Vol. 47, 31-39, 2014.

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