Multi-target TBD (track-before-detect) method for parallel computation

Abstract

The invention relates to a multi-target TBD (track-before-detect) method for parallel computation. The method comprises steps as follows: step A, radar echo data are acquired; step B, accumulation of a value function is performed in each pre-determined direction, and tracks of targets in the pre-determined direction are determined with a track backtracking method according to accumulation of the value function; step C, track fusion is performed, and tracks sought in each pre-determined direction are fused together; step D, a complete track is output. According to embodiments of the method, the track detection performance of crisscross motion targets is improved, and the computation time is shortened.

Description

technical field [0001] The invention belongs to the technical field of radar data processing and relates to target detection and tracking. Background technique [0002] The diversity of targets and the complexity of the environment make the detection capability of modern radars face huge challenges, and the problem of weak target detection is one of them. The development of stealth technology has reduced the RCS (radar reflection cross section) of the aircraft by one to two orders of magnitude, the target reflection echo has been greatly weakened, and the radar detection power has been significantly reduced, resulting in a large area of ​​holes in the air defense network, which has brought great harm to national security. threaten. On the other hand, the flight speed of the target has been greatly increased, which has sharply reduced the radar warning time. For this reason, radars are required to detect distant targets with weaker echoes. In addition, the target signal-to...

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Problems solved by technology

[0006] However, the methods in the prior art have problems such as large amount of calculation, inability to detect and track the cross-travel target trajectory well, and long calculation time.

For example, in the document "Track-before-detect procedures in a multi-target environment" (IEEE Transactions on Aerospace & Electronic Systems, 2008, 44(3): 1135-1150.), the dynamic programming tracking method adopted in the detection procedure can realize the monitoring The number of targets in the field estimates and recovers the tracks of all targets, but this method assumes that all targets are independent of each other, and the detection and tracking performance of adjacent and intersecting moving targets is not good

In the dynamic programming method mentioned in the document "Research on Multi-Target Tracking Algorithm Based on Tracking Before Detection Technology" (University of Electronic Science and Technology, 2012), only one corresponding optimal target state is searched in each target track search process. Then delete the confirmed target on the measurement plane, and perform the next best target search, which can realize the tracking of adjacent targets, but when the targets intersect, the tracking performance of this method is not good; and when the search window When the definition is too large, the amount of calculation will increase greatly

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