Research on an Intensive Coherent Interference Suppression Method of the Autonomous Underwater Vehicle Acoustic System

Time reversal mirror technology is a new method of localization, which may be applied to target detection and localization effectively. Intensive coherent interference will conduct the autonomous underwater vehicle focus on the strong interference and reduce the detection probability. This paper brings out time reversal passive shielding and focusing (TRPSF) method with two vector-sensors´ vertical array, which sets the zero point at the position of strong interference. By a micro-sized array, autonomous underwater vehicle can not only overcome strong interference at a certain place of its stern by TRPSF technology, but also refocus the signal energy in its original area. The using of TRPSF can enhance the detection probability and locate the weak target without detecting blind area. Simulations and experiment in the pond results prove its feasibility and practicality.