Anti-Multipath Near-Field Localization in Multi-Path Underwater Acoustic Channel

Focused beamforming is a useful method for solving near-field localization problem in underwater acoustic. But we should consider the following conditions: (1) we should regard the radiated noise in the near-field as non-point sources. (2) Multipath signal may severely interfere with the location results in the shallow sea. Due to the above two factors, the locating performance of focused beamforming is declined seriously. Hence, it is urgent to solve the non-point sources localization problem in shallow water. In this paper, a new anti-multipath near-field localization technique is introduced. Compared with other methods, because the new proposed method makes utilize of the spatial geometry, it can effectively obtain the channel impulse response and match the underwater channel in practice.