Space-time Optimum Processing for Acoustic Homing System in Reverberation Background

Reverberation is the main background noise of the torpedo active sonar, which limits active sonar target detection in the shallow sea. Space-time two-dimensional spectrum characteristic of receipting reverberation signal for homing system in the motion process are analyzed based on the reverberation Doppler variation at different angles of incidence. Optimum space-time processing and the evaluation method are also analyzed. The validity of this method is verified by the simulation output of the processor, the judgment criterions of space-time adaptive process technology are discussed, and the influence of the variation of array element number on the improvement factor of the optimum processor is analyzed.