Detecting tracking integrated method for multi-target scene

A detection and tracking, multi-target technology, applied in the field of radar detection and tracking, can solve problems such as unsolvable problems, difficult association between measurement point traces and target track data, mutual interference between different tracks, etc.

Inactive Publication Date: 2013-12-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, these research works are all aimed at the single target situation. However, in the actual radar surveillance environment, it is often encountered that multiple targets exist at the same time. At this time, it is necessary to estimate the state of each target at the same time. The single-target detection and tracking integration scheme cannot effectively monitor and track multiple targets, because as the number of targets incr

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  • Detecting tracking integrated method for multi-target scene
  • Detecting tracking integrated method for multi-target scene

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Embodiment 1

[0046] There are two adjacent targets in the scene and the trajectory has started. The starting point of target 1 is (12m, 11m) and the initial speed is (1.5m / s, 1.5m / s); the starting point of target 2 is (11m, 12m) and the initial speed (1.5m / s, 1.5m / s); observation interval t=5s, the total number of observation frames is 30, process noise σ P =0.025, measurement noise σ m =10, the same SNR of the two targets is 10dB. Combine figure 1 The multi-target detection and tracking method based on the present invention is as follows:

[0047] Step a: Start each target track and get the initial position estimates of the two targets And estimated error autocorrelation matrix P 1 (0|0), P 2 (0|0); initialize the current moment k to 1.

[0048] Step b: Calculate the position prediction values ​​of the two targets at time k And innovation autocorrelation matrix S 1 (k), S 2 (k).

[0049] Step c: see figure 2 , Calculate the detection decision threshold of the two targets at the distance uni...

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Abstract

The invention discloses a detecting tracking integrated method for a multi-target scene, and belongs to the technology of radar detecting and tracking. The method is a multi-target tracking method coupling Bayes detection and joint probabilistic data association (JPDA) filtering. The method includes the steps that position distribution information of targets at the current moment is calculated according to prediction of a JPDA tracking filter at the previous moment; a Bayes detector takes the distribution information as prior information for detecting a judgment and detects the targets; finally, the JPDA tracking filter is used for detecting obtained measurement trace points and carries out data correlation on the measurement trace points and the targets to finish position estimation and track updating of the targets at the current moment, and position distribution information of the targets at the next moment is predicted. The method can be used in detection and tracking of adjacent targets, and has good performance and good practicality.

Description

Technical field [0001] The invention belongs to the field of radar signal processing, and specifically relates to radar detection and tracking technology. Background technique [0002] The target tracking of active radar generally adopts the detection after tracking system (DBT), that is, the single-frame threshold detection and judgment are performed to obtain the point trace data, and then the point trace data that has passed the threshold are processed by aggregation, correlation, and filtering, and finally formed Target track. In the case of high signal-to-noise ratio (SNR), the traditional detection and tracking technology can effectively realize the detection and tracking of the target, and has the advantages of small calculation amount and less radar system resources. However, with the continuous development of modern stealth technology, the target radar cross-sectional area (RCS) has been greatly reduced, and the interference of strong clutter environments (urban, forest...

Claims

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Application Information

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IPC IPC(8): G01S13/66G01S13/58G01S7/41
Inventor 孔令讲杨晓波王云奇易伟崔国龙
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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