TWO UNIFORM LINEAR ARRAYS FOR NON-COHERENT AND COHERENT SOURCES FOR TWO DIMENSIONAL SOURCE LOCALIZATION

This paper presents a novel method for the two-dimensional direction of arrival (DOA) estimation based on QR decomposition. A conflguration with two uniform linear antenna arrays (ULAs) is employed for the joint estimation of elevation (µ) and azimuth (`) 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(N 3 ) 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.