Application of stochastic resonance technology in underwater acoustic weak signal detection

摘要

The high frequency Chirp signal in underwater acoustic communication usually submerged in various noise produced by ocean waves, ships, etc. In this paper, based on the principle of stochastic resonance for weak signal detection, the extraction and energy enhancement of high frequency weak signal are achieved by using bistable stochastic resonance system. The genetic algorithm is additionally used to adaptively select the system parameters. Finally, the principle is verified to be correct and feasible with spectrum chart and FRFT through simulation and experiments which provides a new analysis method and design guidance for the enhancement and detection of underwater acoustic weak signal.