Research On GeneralizedCross-Correlation Passive Ranging Of Noise Target

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.The main research task of three non-symmetry array passive ranging technology is analyzing symmetry array and non-symmetry array ranging and direction detecting theory, analyzing symmetry array and non-symmetry array ranging and direction detecting error and discuss the problem of range blurring in passive ranging. For the traditional passive ranging SONAR, K parameter distribution method (K - PDM) 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 (DMM) is used to range, and conquer traditional SONAR near ranging blurring problem. Achieve whole ranging. Resolve non-symmetry array ranging problem. Have ranging software used in not only symmetry array but also non-symmetry array, and application is more aboard. If confront fish torpedo huge attack, it's necessary to track contrail apace. So it's very important of Adaptive filtering capability. In this passive ranging software, apply noise counteract based LMS arithmetic to track the fast targets apace.Based the improved system hardware, develop this real-time system software. The function of real-time system software consists: ranging three targets at the same time, ranging targets distance,direction detecting,identifying fast targets and ranging reliability.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 TMS320C6416 hardware accomplishes target passive ranging (use target simulator to unite debugging ). The experimentation result proves that passive ranging software capability is excellent.