Two new MODE-based algorithms for 2D DOA estimation in large scale antenna array systems

In this paper, we divide a DOA related two-dimension weighted subspace fitting function into two independent one-dimension versions, and propose two novel direction of arrival (DOA) estimation algorithms. The first one is designed for uncorrelated sources, which includes only one-time polynomial rooting and no angle paring; the second one for coherent multipath sources, which includes two-time polynomial rooting and angle paring but no spatial smoothing. Compared with some exist algorithms, both proposed algorithms are of computational efficiency and all have better angle estimating performance. Simulation results prove the effectiveness of the two algorithms.