Realization Of Real-time Signal Processing Algorithms For Passive Acoustic Positioning System

The technique of passive positioning has always been the focus of acoustic researchers. The passive tracking system for underwater high speed target needs measure the three-dimensional position of the movable target, which is the first passive tracking system of our country. Passive ranging technology needs no information of the target signal form, which would improve naval shooting trial efficiency greatly, achieving the mission of assure the weapon trial and scientific research trial.This dissertation mainly aim at acoustic signal processing of the buoy partial system, designing and implementing acoustic signal processing software and on-chip peripherals control on DSPs, which measure acoustic information and afford the necessary parameters for measure the three-dimensional position of the target in real time on compute. A vector sensor can measure simultaneously pressure and particle velocity co-location, and a single vector sensor can estimate the Direction-of-Arrive(DOA)un-ambiguously in the whole space. High-precision azimuth angle estimation is the key point of this system, and we use ripe method of histogram estimation azimuth angle. The main obstacles for the passive tracking system are the Doppler and multipath effect. The Doppler compensation is necessary for the high speed target tracking. This dissertation proposed Doppler compensation method for this system to obtain high estimation precision of time delay difference.The principal part of the acoustic signal processing module is two pieces of TMS320C5509A, which are connected by serial port. DSP software is realized in assemble language. This dissertation is based on engineering realization, and design acoustic signal processing program on two DSPs. We consider the compute range of the program, quantized precision, fault-tolerant capability to realize the real-time, active utility and stability of the system. Through simulator test in the laboratory and trial in the lake, the signal processing software is tending to be mature and perfectly, whose qualification meets the system requirements.