Signal Processing And Storage Platform Design Of Multi-target Positioning System

This research topic originates from a underwater target positioning system, which applies long baseline acoustic positioning technique to track and locate multiple underwater targets, it is based on buoy array .The dissertation is about design and implementation of signal processing and storage platform, which is part of the buoy electronic system and responsible for underwater acoustic signal reception, multi-target signal processing, original data and intermediate results storage and transmission.The paper firstly analyses the requirements of signal processing and storage platform,the computation of algorithms, interface ability, data transmission, storage capacity, anti-jamming,low-power and other aspects are described. On this basis, we propose the DSP+FPGA architecture for the platform. In this architecture, the DSP is responsible for signal processing and time-delay estimation, the FPGA is responsible for signal acquisition, interface extension,data distribution and storage. FPGA+NAND Flash method is adopted for original data storage, and DSP+Flash method for intermediate result storage, FPGA and DSP communicate via McBSP. Then,the paper introduces the selection of main components and their functional indicators. According to the system requirements, we realize the signal storage and processing function in two circuit boards, data transfer is completed through the motherboard.The design and implementation of hardware circuits is completed in this paper, and then the design ideas and functions of each part are discussed in details. Based on the completion of the hardware platform, the paper introduces part of the software design and debugging.DSP interface management is realized by register configuration, making use of McBSP and DMA, EDMA3 for data and instruction movement. Modular design concept is adopted for FPGA logic development, completing the design and debug of acquisition control module,data transmission module,data storage module .Finally, the hardware and software test results are described, verifying the feasibility of our design.