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External radiation source radar multi-target tracking method based on three-dimensional data association

An external radiation source radar, multi-target tracking technology, applied in the direction of radio wave reflection/re-radiation, use of re-radiation, measurement devices, etc. Good tracking effect, improve real-time effect

Pending Publication Date: 2021-04-30
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-target tracking method for external radiation source radar based on three-dimensional data association to solve the problem of low success rate of multi-target track association in the prior art

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  • External radiation source radar multi-target tracking method based on three-dimensional data association
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  • External radiation source radar multi-target tracking method based on three-dimensional data association

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Embodiment

[0145] 1. Simulation scene setting

[0146] In order to verify the effectiveness of the multi-target tracking method for external radiation sources of the present invention, 10 targets moving in a straight line at a uniform speed are simulated and analyzed. In the simulation scene, both transmitters and a receiver are stationary. The receiver is located at the origin of the three-dimensional space coordinates, the positions of the transmitters are: [29434m, -34761m, 293m] and [12845m, -106922m, 293m] respectively, and the transmitting frequency is 500MHz. The radar sampling period is 1s, the whole tracking time is 200s, and the number of Monte Carlo simulations is 150 times. The system process noise intensity is 5, and the distance and Doppler noise obey the Gaussian distribution with mean zero and covariance 500m and 20Hz respectively. The number of radar clutter obeys the Poisson distribution and is uniformly distributed in the range-Doppler space. The average number of clu...

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Abstract

The invention discloses an external radiation source radar multi-target tracking method based on three-dimensional data association. The method comprises the steps of: building measurement-target and measurement- transmitter data association relations, respectively obtaining a state one-step prediction equation, a multi-target state prediction equation and a multi-target measurement prediction value of each target sigma point, calculating a state prediction covariance of each target according to the result, synthesizing a measurement covariance by distance-Doppler of each Sigma point, and then obtaining a filtering gain; and correcting the multi-target state equation and the distance-Doppler measurement equation to obtain a corrected multi-target posteriori association probability, calculating a state prediction value and a state prediction covariance of each target through a PMHT algorithm according to the multi-target posteriori association probability, and fusing the state prediction covariances of the state prediction values corresponding to the S transmitters obtained in the step 10 by adopting a multi-sensor sequential processing structure. The accuracy of the posterior association probability of multiple targets, measurement and transmitters can be improved.

Description

technical field [0001] The invention belongs to the technical field of external radiation source radar tracking methods, and relates to a multi-target tracking method for external radiation source radar based on three-dimensional data association. Background technique [0002] The rapid development of information technology has intensified the competition between the combatants around the control of the electromagnetic spectrum. It is difficult for traditional active radars to meet the requirements of "self-concealment, flexible station deployment, and precise strikes" in modern warfare. In order to overcome the deficiencies of traditional active radars, major countries in the world have carried out research on external radiation source radars. External radiation source radar target tracking refers to the radar system processing other non-cooperative radiation source signals (such as TV, navigation, communication, satellite signals, etc.) reflected by the target to achieve t...

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Application Information

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IPC IPC(8): G01S13/72G01S13/00G01S7/41
CPCG01S13/726G01S13/006G01S7/418G01S7/415G01S7/414
Inventor 李晓花卢博金海燕
Owner XIAN UNIV OF TECH
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