Research On Passive Localization Technique Of Underwater Sound Source

The Passive Localization method is analyzed and generalized in the dissertation. Aimed at the engineering realization of the generalized phase data method in small-scale detection device, a complete and typical hardware platform is established. This hardware platform is consisted of three parts: signal preprocess part, advanced warning part and signal processing part.According to the requirement of linearly amplifying and filtering the signal on passive localization system, in the signal preprocess part, the digital programmable gain without A/D and the digital programmable pass-band receiver is designed and debugged, and the ways to resist the disturbs are generalized.Aiming at the requirement of low power consumption in passive localization system, the main technique theory of advanced warning detection technology is introduced in the second part of dissertation, the digital processing of advanced warning detection technology without A/D is realized by a microcontroller ,and the false alarm probability of the detection is constant. The effectiveness of the advanced warning system is proved using the real ship data.The software and hardware of DSP system to realize the passive localization are introduced in the dissertation, and the correctness of the software and hardware is proved.