Counter range dragging method based on alpha-beta filtering

Abstract

The invention provides a counter range dragging method based on alpha-beta filtering. The method comprises the steps of (S1) carrying out alpha-beta filtering on a target movement trajectory continuously, (S2) if an AGC has a falling edge jump, going to a step (S3), otherwise assigning a memory tracking distance with a filtering distance, and going to the step (S1), (S3) carrying out extrapolation initialization, and assigning the extrapolation speed of memory tracking with a current filtering speed, (S4) carrying out memory extrapolation according to a memory tracking distance of a final time and the extrapolation speed before interference, (S5) if a difference between the memory tracking distance and an actually measured difference is larger than a threshold, performing a step (S6), otherwise returning to the step (S4), (S6) sending the memory tracking distance to correct a range gate, (S7) if the differences between the memory tracking distances and actually measured differences of 100 consecutive frames are larger than a threshold, performing a step (S8), otherwise returning to the step (S4), and (S8) correcting the memory tracking distance and the extrapolation speed with a filtering value, and returning to the step (S4). The method has the advantages of a small amount of alpha-beta filtering calculation and high real-time performance, the method is used for counter range dragging, the requirement of speed measuring precision can be greatly reduced, and the method is suitable for practical application of engineering.

Description

technical field [0001] The invention relates to a method for resisting distance dragging, in particular to a method for resisting distance dragging based on α-β filtering. Background technique [0002] In a complex electromagnetic environment, the radar must also deal with various interferences while searching and tracking the target. The deceptive range towing jamming is a typical active jamming method, which induces the radar to track the jamming signal incorrectly until the original target cannot be recovered in the end. For radar, the purpose of its anti-jamming is to make it not be deceived and to track the target stably, or to minimize the impact of interference on tracking accuracy, and the main means of anti-jamming is to separate the target from the jamming background and complete Precise tracking. [0003] The distance towing jamming is mainly aimed at the radar that performs distance tracking. The jamming pulse signal is generated by the jammer to make the radar...

AI Technical Summary

Problems solved by technology

This method uses the Kalman filter to identify sudden changes in the target speed, and has a good detection effect, but the amount of calculation is large, and it is not suitable for applications in scenarios with high real-time requirements.

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