Track fusion method of external radiation source radar target based on time-varying positioning error

Abstract

The present invention discloses an external radiation source radar target track fusion method based on a time-varying positioning error. The method comprises a step of calculating and obtaining a target fuse track state estimator at a k time and the covariance matrix of the target fuse track state estimator at the k time, and calculating a decorrelation target local track state estimator of a receiving station at the k time and the covariance matrix of the decorrelation target local track state estimator of the receiving station at the k time, a step of calculating the track state estimator of the target fuse track at the k time and the covariance matrix of the track state estimator of the target fuse track at the k time if the current time is corresponding to a fuse time, otherwise obtaining the track state estimator of the target fuse track of a k-1 time and the covariance matrix of the track state estimator of the target fuse track, calculating the track state predicted estimator of the target fuse track at the k time and the covariance matrix of the track state predicted estimator of the target fuse track at the k time, and finally obtaining the final output of the target fuse track by an external radiation source radar networking system.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and in particular relates to a tracking fusion method of an external radiation source radar target based on a time-varying positioning error, which is used for each receiving station to track the target when the external radiation source radar networking system tracks the target. Tracking and fusion of the local track of the target. Background technique [0002] External radiation source radar is a passive radar that detects, locates and tracks targets by receiving electromagnetic echoes irradiated by non-cooperative external radiation sources (such as FM radio, digital TV, etc.), and is also a dual (multiple) Base radar, and because the external radiation source radar has a special transceiver system, the external radiation source radar has the characteristics of anti-jamming, anti-radiation missile and anti-stealth. In recent years, with the development of digital communication...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the object of the present invention is to propose a method for merging the track of an external radiation source radar target based on a time-varying positioning error. It can overcome the shortcomings of using a single set fixed value to replace the time-varying positioning error, and greatly improve the fusion accuracy of the target fusion track

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