Near-field target location estimation by using Khatri-Rao product array

In this paper, we examined available of the Khatri-Rao product array for near-field source location estimation having spherical wave incidence. In this problem, we show that the KR product increases the degrees-of-freedom of the may effectively. Furthermore, we propose the EM-ML algorithm which can remove signal correlation error in the KR product array. Simulation results show that the proposed algorithm can improve estimation accuracy effectively.