Sector-scanning radar space-time joint target tracking method

Abstract

The invention relates to a sector-scanning radar space-time joint target tracking method. The method comprises the steps: obtaining measurement information of a current period from an observation radar; judging whether flight paths exist in the current period or not, if flight paths exist in the current period, sequentially executing the steps, and if flight paths do not exist in the current period, skipping to execute the last step; carrying out one-step prediction on all currently existing flight paths to obtain a flight path existence probability prediction value of a current period, and aone-step prediction value and a measurement prediction value of a state; establishing a related wave gate for each flight path, and obtaining trace points related to the flight path; filtering by utilizing the trace points related to the flight paths to obtain a plurality of state estimation values; carrying out probability interconnection on a plurality of corresponding state estimation values and the one-step prediction value of the state to obtain a target final state estimation value and a flight path existence probability; and carrying out flight path initialization on the trace points which are not used for updating the flight paths, and thus obtaining a new flight path target initial state. The method can effectively improve the sector-scanning radar multi-target tracking precisionand efficiency.

Description

technical field [0001] The invention relates to the technical field of space target tracking, in particular to a sector-scan radar space-time joint target tracking method. Background technique [0002] Because the radar antenna moves back and forth within a certain sector range, the sector scan radar scans the same target twice within a week, so the sector scan radar must have the following problems: [0003] 1. The radar not only has a scanning boundary in the azimuth, but also has a difference in the scanning direction for the same azimuth, so that the track pre-correlation can not only be controlled by the azimuth of the point track and the track, but also related to the scanning direction, especially in the scanning direction. For border targets, the sampling intervals of radars in different scanning directions often vary greatly. [0004] 2. The target prediction time on different azimuths (after obtaining a certain target track, predict the time when the same target w...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to solve the problem of model mismatch and large detection deviation in the traditional target tracking method for sector-scan radar

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