A Method of Tracking Direction of Arrival for Dynamic Targets Based on Mesh Division

Abstract

The invention discloses a dynamic target direction of arrive tracking method based on mesh dividing. Firstly sensor arrays are arranged in a simulated environment; then a narrow-band signal measurement model of the far-field sensor arrays is established; a source signal model of which space contains noise is constructed; a planar environment is averagely divided into meshes, and the size of the range of the signal incident angle of all the meshes is equal; then a target transfer model is constructed, and the possible state of a target of the next moment is predicted; a Kalman filter equation is generated through combination of the state transfer model of the target and the sensor measurement model, and the signal state value of each divided mesh is solved; and finally the mesh to which the target belongs is determined by utilizing an appropriate method according to the state value of the mesh so that the location of the target can be determined. According to the method, the linear equation of target transfer and signal measurement is constructed by utilizing mesh dividing, and then target tracking is realized through combination of the Kalman filter method so that the disadvantages of the conventional method that computation is complex, computation burden is high and final estimation precision is insufficient can be overcome.

Description

technical field [0001] The invention relates to a dynamic target direction-of-arrival tracking method based on grid division, which is widely used in real-time tracking of dynamic targets based on wireless sensors. Background technique [0002] Dynamic target tracking is to use the signal emitted or reflected by the detected moving object to evaluate the trajectory of the moving object through a certain algorithm. First of all, it is necessary to use a specific device for receiving signals to continuously receive signals, and preprocess the signals such as filtering to obtain the required signal information; and then perform operations such as filtering or signal transformation on the obtained signals through specific algorithms to directly or indirectly solve the problem. output the required value. [0003] At present, target tracking technology is widely used in both civilian and military fields. In some researches, it is divided into two categories: single target trackin...

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Problems solved by technology

[0011] The purpose of the present invention is to address the deficiencies in the prior art, and propose a dynamic target direction-of-arrival tracking method based on grid division, which overcomes the high computational complexity, large amount of calculation, and long calculation time of traditional DOA tracking technology So that it is difficult to meet the needs of practical applications and other issues

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