A Space-Based Radar Range/Velocity Defuzzification Method Based on Fuzzy Matrix Update

A fuzzy matrix, space-based radar technology, applied in the field of space-based radar ultra-high-speed target detection distance and speed defuzzification, radar field, can solve a large number of ghost points and other problems, achieve good real-time performance, good engineering application value, anti-noise ability strong effect

Active Publication Date: 2022-04-26
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Problems solved by technology

The defuzzification method based on Lattice matrix transforms the distance defuzzification problem into a Lattice matrix solution problem, which can meet the requirements of time efficiency and solution accuracy at the same time, but under the condition of low signal-to-noise ratio and multiple targets, a large number of ghost points will appear

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  • A Space-Based Radar Range/Velocity Defuzzification Method Based on Fuzzy Matrix Update
  • A Space-Based Radar Range/Velocity Defuzzification Method Based on Fuzzy Matrix Update
  • A Space-Based Radar Range/Velocity Defuzzification Method Based on Fuzzy Matrix Update

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Embodiment 1

[0044] The usage scenario of this embodiment is: there are 4 targets in the two-dimensional observation scene of interest, and their corresponding distances and Doppler positions are shown in Table 1. Under two different PRFs, the range and Doppler position information of the target is different.

[0045] Table 1. Target range and Doppler position under two sets of PRF

[0046] Target 1 2 3 4 distance index 1 62 691 726 1527 Doppler index 1 119 1174 1741 995 distance index 2 305 1045 654 1067 Doppler index 2 3 1531 1553 1205

[0047] The effectiveness of the proposed method is verified with two different PRF combinations. The frequencies of the first group of PRFs are 25200Hz, 25300Hz, 24500Hz and 24750Hz respectively, and the second group of PRFs adds a repetition frequency of 25000Hz on the basis of the first group of PRFs. The specific defuzzification implementation steps are as follows:

[0048] Such as figure 1 As ...

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Abstract

The invention discloses a space-based radar distance / velocity defuzzification method based on fuzzy matrix update, which belongs to the technical field of radar. The present invention uses a fuzzy matrix to replace the traditional distance-velocity two-dimensional separation and defuzzification criterion, and can avoid the problem of fractional error by means of matrix expansion, element sorting, amplitude variance sorting and element update, and can solve multi-target pairing errors and problems at the same time. Ghosting issues caused by noisy pairings. Under multiple PRF observations, the present invention realizes multi-target range-velocity defuzzification of space-based radar target detection and can suppress the appearance of ghost images. The invention has the characteristics of fast calculation speed, good real-time performance and strong anti-noise ability, can deal with multi-target or missile penetration situations, and has good engineering application value. The invention is especially suitable for ultra-high-speed target detection and multi-target range-velocity defuzzification.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to the field of space-based radar ultra-high-speed target detection range velocity defuzzification field. Background technique [0002] Space-based radar is not limited by national boundaries, and can greatly overcome the influence of the curvature of the earth. It has a long range of action and coverage. Space-based radar has a long range of action and fast detection of targets. Therefore, there is inevitably the problem of ambiguity in the distance and speed of target detection. , which has a great impact on the positioning and continuous tracking of the target. [0003] The design of multiple frequency groups is currently the main method for defuzzification of target velocity and distance. For the selected Pulse Repetition Frequency (PRF) combination, more mature algorithms mainly include Chinese remainder theorem, one-dimensional set method, residual look-up table method, multi-h...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S13/58
CPCG01S7/418G01S13/58G01S13/582
Inventor 段崇棣卜祥元王伟伟李渝
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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