Modeling and Simulation of Passive Sonar Signal under Channel Conditions

In view of the problem that the existing passive sonar signal simulation does not consider the marine environment and underwater acoustic channel, which may not reflect the received signal of the actual array element, this paper establishes the mathematical model of the received signal of the passive sonar in the shallow sea channel condition combined with the marine environment parameters and the channel multipath model. The multi-path channel model is calculated based on Gaussian ray tracing method; The environmental noise model is obtained by the classical formula of marine environmental noise spectrum; The radiated noise signal is calculated by the superposition of characteristic line spectrum and broadband continuous spectrum. The broadband continuous spectrum is constructed by specific frequency response FIR filter, and the comprehensive simulation results are given. The research of this paper can provide some reference for passive sonar detection and recognition, and can also be used as the signal source of target signal simulator and hardware in the loop simulation.