Parameter Estimation of Near field Sources Based on Blind Source Separation

In this paper， the problem of Direction-Of-Arrival (DOA) and range estimation of near-field sources is researched. It is proposed to adopt blind source separation (BSS) method to estimate the array manifold matrix first， and then estimate DOA and range parameters by means of optimization algorithms. The proposed method does not require operations of frequency domain searching and parameter pairing. Besides， the Fresnel approximation is not adopted， so the proposed method can also be applied to cases where sources are not all in the Fresnel region. Its good performance is verified by computer simulation results.