DOA Estimation And Target Tracking

Direction of arrival estimation and target tracking are an important research direction of underwater acoustic signal processing.This paper focuses on the beamforming of underwater acoustic signals,the direction of arrival estimation(DOA)of underwater targets and the target tracking based on dynamic programming.The main contents are:(1)The basic principles of beamforming and direction of arrival estimation(DOA)are discussed.The array signal model is established,and the conventional beamforming algorithm and the minimum variance undistorted beamforming method are discussed.An optimized beamforming algorithm is studied for the problems of the conventional beamforming algorithm.The simulation analysis compares the low SNR.The DOA estimation performance of the three methods.(2)The single target tracking based on dynamic programming is studied.The basic principles and implementation methods of basic dynamic programming are discussed.For the underwater target tracking,the state model and measurement model of the system are established.The influence of algorithm parameters on tracking performance is discussed.The energy diffusion problem of the algorithm is proposed.The tracking algorithm based on adaptive state transition number is studied.The target tracking method based on exponential smoothing prediction is studied.The tracking algorithm combining adaptive state transition number and triple frame value function accumulation is proposed to improve the tracking performance.In the case of appearance and disappearance,the track backtracking algorithm based on dynamic threshold is studied.The performance of the above algorithm is simulated.(3)Research on multi-target tracking based on dynamic programming.The principle of multi-target tracking method based on dynamic programming is discussed.The multi-target tracking method based on extremum method and culling method is discussed.The multi-target tracking method based on least squares prediction is proposed,which effectively realizes the adjacent target and cross target.Tracking;simulation analysis of the performance of the above algorithm.