3-D Localization for Near-Field and Strictly Noncircular Sources via Centro-Symmetric Cross Array

In this article, we consider the problem of three-dimensional localization for near-field and strictly noncircular sources via centro-symmetric cross array (CSCA). To obtain satisfactory localization results including range and direction of arrival estimations without multi-dimensional spectral search, two connection-matrices are constructed to set up the relation between the information originating from the two branches of CSCA and utilize rank-reduction technique to perform localization, which helps to fully exploits not only the received signal and its conjugation part, but also the whole information including self- and cross-information, and meanwhile only requires to perform one-dimensional spectral search several times. Finally, we perform the angle pairing on the basis of the third connection-matrix. The proposed algorithm is able to obtain more accurate estimation and better range resolution than the localization utilizing only self-information due to the utilization of the whole received information. Simulation results verify the validity and superiority of the proposed algorithm.