DOA Estimation FPGA Design Of Illegal Operation Monitoring Equipment

At present, we maintain our maritime rights by regular cruise, which is untimely, incomplete and costly. So it’s significant to exploitation a Long-term unattended equipment to monitor illegal operation based on buoy, which can illustrate the position of targets and is significance for enforcementing maritime rights.In this dissertation, studying and implementing DOA estimation FPGA design of Illegal operation monitoring equipment based on the Xilinx Zynq processor, which can effectively distinguish long-range goals. Illegal operation monitoring equipment solves the problems of the hardware system complexity, high cost and high power consumption etc. At the same time, it can meet the signal processing system’needs of long-running. Gain control of analog front acoustic signal, collection and storage of four synchronous original data, MVDR(Minimum Variance Distortionless Response) direction finding algorithm and vector direction finding algorithm, data and command interaction between the FPGA and ARM are realized using the Zynq FPGA. A target orientation analysis is completed every 0.5s. The originl data and orientation output results are transferred to Zynq ARM module by FPGA after the completion of operation. ARM stores originl data using SD card, at the same time, it transfers orientation output results to the station with underwater communication module, by which real-time detection and tracking of target can be completed.Firstly, spatial single target data is generated with the help of mathematical software Matlab. Secondly, target data is converted into analog data based on NI PXI-8109 processor and input to signal processing system. Finally, the data stream of key aspects for algorithm operation is taken with Vivado Simulator compared with the operation results of MATLAB, the correctness and stability of the proposed FPGAs’ direction finding algorithm are demonstrated. The testing results shows that System’s period is 10 minutes with 1 minutes working, the maximum active power consumption is 2.2326W, standby power consumption is 150mW, the DOA deviation is within ±3°, the other indicators fulfil system’s needs.