Multi-target tracking method for sequence UD decomposition

Abstract

The invention discloses a multi-target tracking method for sequence UD decomposition. The multi-target tracking method is used for solving the technical problem that the conventional target tracking method is unstable in numerical value structure so as to cause target tracking loss in the radar tracking process. The technical scheme is that an evaluated error covariance matrix is subjected to sequence UD decomposition, a numerical value stabilizing structural model is established, two positive semi-definite matrixes in a covariance matrix without error evaluation are subtracted, and a symmetric matrix containing a negative eigenvalue is not generated in a word length limited processing system. The evaluated error covariance matrix is subjected to sequence UD decomposition, so that a multi-target tracking structural model with a stable numerical value is established, the two positive semi-definite matrixes in an evaluated error covariance matrix are prevented from being subtracted, and numerical divergence is avoided in the word length limited processing system; and therefore, the reliability of the target tracking system is guaranteed, the target tracking loss in the radar tracking process and the whole radar system error are avoided.

Description

technical field [0001] The invention relates to a radar multi-target tracking method, in particular to a sequence UD decomposition multi-target tracking method, which belongs to the field of information technology. Background technique [0002] Multi-target tracking technology is widely used in military and civilian fields, and can be used for air target detection, tracking and attack, air missile defense, air traffic control, port and ocean surveillance, etc. In recent years, with the change of the battlefield environment and the development of countermeasures and anti-countermeasures technology, a series of problems such as strong background clutter, low signal-to-noise ratio, low detection probability and high false alarm rate have arisen. and accuracy put forward higher requirements. [0003] The purpose of multi-target tracking is to correspond the measurements received by the detector to different information sources, form different observation sets or trajectories, e...

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Problems solved by technology

[0004] In order to solve the technical defect that the numerical structure of the existing target tracking method is unstable and cause the target to lose track during the radar tracking process, the present invention provides a multi-target tracking method based on sequence UD decomposition. In this method, during the time and measurement update of multi-target tracking, By performing sequence UD decomposition on the estimated error variance matrix, a numerically stable structural model is established. In the variance matrix without error estimation, there are two semi-positive definite matrices subtracted, which can guarantee that no negative eigenvalues ​​will be generated in a processing system with a limited word length. The symmetric matrix of the radar tracking process can avoid target loss and the whole radar systemic error

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