Research of underwater acoustic confrontation technology based on warship radiated noise modeling

Warship radiated noise provides information of search, detection and tracking for underwater acoustic detection equipments, and it´s one of the important information source of modern marine information warfare. In addition, attack and track of acoustic-guided weapons and acoustic fuze weapons are based on the radiated noise, so the characteristics of warship-radiated noise is the important basis in underwater weapon development. In order to study the change rule of warship radiated noise characteristics, this article carries on the fundamental analysis for the acoustic characteristics of radiated noise and preliminary research to the simulation of warship-radiated noise. Through a series of sine signals to structure line spectrum signal, with white gaussian noise by Butterworth band-pass filter to structure the continuous spectrum signal, and make related simulation based on the MATLAB. Finally carries out wavelet reconstructing and radiated analysis for the warship radiated noise power spectrum. The experimental results show that this paper provides target broadband noise waveform signal of abundant characteristics for building the signal level simulation system of passive sonar. At the same time also provides a certain theoretical basis for the radiated noise cheating technology.