A search-free near-field source localization method with exact signal model

Most of the near-field source localization methods are developed with approximated signal model, because phases received highly non-linear. Nevertheless, model based suffer from mismatch and performance degradation while exact estimation usually involve parameter searching or multiple decomposition procedures. In this paper, a search-free method is proposed model. Firstly, approximative estimates direction arrival (DOA) range obtained by using through separation polynomial rooting operations. Then, corrected according to expressions phase difference in observations. The avoids spectral pairing has enhanced performance. Numerical simulations provided demonstrate effectiveness method.