Joint detection and tracking method for sea target by using two-coordinate radar

Abstract

The invention provides a joint detection and tracking method for a sea target by using a two-coordinate radar. The method includes: performing background self-adaptive threshold detection on originalvideo data, and initially eliminating the clutter and noise; extracting trace point information according to the order of distance first and position second, secondly eliminating threshold-crossing echoes that do not satisfy the aggregation criterion, and calculating the track point quality according to the distance azimuth two-dimensional echo characteristics of the condensed track points; usingthe dynamic hypothesis path search and the track point quality as a reference to define a search path cost function, and forming a dynamic hypothetical track cluster; and finally using the multi-cyclecost function accumulation result to perform detection decision and track optimization and merging to achieve joint detection and tracking of the target.

Description

technical field [0001] The invention belongs to the technical field of radar target detection and tracking. Background technique [0002] Radar target detection and tracking under the background of sea clutter has always been one of the hot issues in the field of radar detection. Because sea clutter has strong echo amplitude in the time domain and presents the characteristics of non-uniform distribution, there will often be A large amount of clutter remains; in the frequency domain, the sea target moves slowly, and the target Doppler frequency is within the range of the sea clutter spectrum, which cannot be effectively separated. A large number of false targets are always accompanied by the automatic detection and extraction of sea targets. In the literature "A radar weak multi-target detection method based on dynamic programming method" (Acta Electronics, 2006, Vol.34, No.12, pp: 2142-2145), the dynamic programming method is used to detect multiple periodic signals of weak ...

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Problems solved by technology

[0003] Aiming at the problems of tracking before detection using only position information or amplitude information, in the document "ANovel Dynamic Programming Algorithm for Track-Before-Detect in Radar Systems" (IEEE Transactions on Signal Processing, 2013, Vol.61, No.10 , pp:2608-2619), the author proposed the idea of ​​pre-detection tracking processing at the point trace level, using the local signal-to-noise ratio of condensed point traces as the dynamic programming index function, compared with the pre-detection tracking directly processed at the video level Algorithm, this method has more potential for engineering application, and it is described in the document "Track-Before-Detect for Sea Clutter Rejection: Tests With Real Data" (IEEE Transactions on Aerospace and Electronic Systems, 2016, Vol.52, No.3, pp: 1035 -1045), the author carried out sea surface target detection and tracking verification based on the measured sea clutter data; however, using the local signal-to-noise ratio of dot traces as the index function cannot effectively distinguish the target and clutter, and the performance will be poor in a strong clutter environment. sharp deterioration

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