Decision-based Algorithm for Robust 2D-DoA Estimation with L-shaped Array

Abstract

The L-shaped array structure is considered as an attractive alternative to estimate entire direction of arrival (both azimuth and elevation). Most of the techniques developed around this specific array structure assume a small elevation angle range (70 to 90 degrees) which is not enough realistic in the context of small cells environment. In this paper, we propose a decision fusion rule of a parallel 2-D direction of arrival (DOA) estimation of shifted signal. The performance of the proposed algorithm is investigated through numerical simulations and compared with the 2D propagator method estimator. The impact of angular spread on the precision of the DOA estimation approaches is also considered. Our algorithm accurately estimates the DOA over a wide range of elevation angle (10 to 90 degrees).