Research On Improved Ranging Of Passive Sonar

The system of passive ranging sonar makes use of the target noise received by the equipment which converts energy from one form to another to estimate the target distance. The main effect of passive ranging sonar is detecting target distance,azimuth and speed and so on. Track the target. It's the key to measure the high precision time delay. The main factor for ranging distance is high precision time delay.There are two research parts in this paper:three non-symmetry array passive ranging simulator research and the system software of passive ranging develop.For the traditional passive ranging sonar, K parameter distribution method is used to estimate the time delay to range for far targets. However, for near-targets, K-PDM has the problem of range blurring. In the paper, direct measurement method is used to range, and conquer traditional sonar near ranging blurring problem. Achieve whole ranging. In this passive ranging software, apply noise counteract based LMS arithmetic to track the fast targets apace. In this paper, passive ranging arithmetic is simulated in Matlab, and give the result of simulation in various phase.Developed passive ranging software system based ADSP-TS101S hardware accomplishes target passive ranging use target simulator to unite debugging. The experimentation result proves that passive ranging software capability is excellent.