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Mirror-image object inhibition method of multi-site radar signal-level combined detection

A radar signal and joint detection technology, which is applied in the directions of measuring devices, radio wave measurement systems, radio wave reflection/re-radiation, etc., can solve problems such as the occurrence of mirror images, and achieve registration calculations with small amount of registration, simple implementation, and mirror images. Suppresses the effect of little residue

Active Publication Date: 2017-02-08
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that when there are multiple targets in space, multiple beams of different radars will not only form intersection points at target positions, but also often form intersection points at non-target positions, resulting in the appearance of mirror images problem, providing a mirror target suppression method

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  • Mirror-image object inhibition method of multi-site radar signal-level combined detection

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[0033] The present invention mainly adopts the method of computer simulation for verification, and all steps and conclusions are verified correctly on MATLAB-R2010b. The specific implementation steps are as figure 1 Shown:

[0034] Step 1. Divide the spatial grid:

[0035] Divide the spatial monitoring area evenly into rectangular grid p with the size of △Lo×△La×△H in the longitude-latitude-height respectively, where △Lo is the longitude width of the grid, △La is the latitude width of the grid, and △H is the height and width of the grid, .

[0036] Step 2. Determine the azimuth θ and elevation of each grid corresponding to each radar site distance r;

[0037] Step 3. Perform matching filtering and moving target detection processing on the echo signals of each channel:

[0038] For the space coordinate system position is (x 0 ,y 0 ,z 0 Target reflection echo at ), located at (x ti ,y ti ,z ti ) of the transmitting radar T i and at (x rj ,y rj ,z rj ) of the rece...

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Abstract

The invention provides a mirror-image object inhibition method of multi-site radar signal-level combined detection. A space monitoring area is divided into spatial grids, and positions of multiple wave beam objects are registered based on space grid information; a detector realizes signal-level detection in a registered monitoring plane; based on an M / N logic decision criterion, the wave beam overlapping frequency of trace points after detection is decided, so that trace points that do not satisfy the criterion are deleted to inhibit mirror-image objects; and a proper minimal distinguishing area is selected, the trace point of the peak value of a statistical detection amount is reserved, and trace points within the proper minimal distinguishing area are combined into a detection trace point. According to the invention, multichannel mirror-image object inhibition is realized under the condition that signal-level combined detection is carried out synchronously in multiple channels of a radar array, the amount of objects can be estimated accurately, mirror-image object inhibition is few in residue, the registering computational complexity of a multichannel object detection unit is low by utilizing the space grid technology, and realization is easy.

Description

technical field [0001] The invention belongs to the technical field of radar target detection, in particular to the technical field of multi-site distributed network radar signal level joint target detection. Background technique [0002] With the development of science and technology, stealth aircraft, stealth drones, cruise missiles and other stealth targets have a small back-scattering cross-section, which greatly challenges the modern air defense network system. In order to deal with the threat of stealth targets, a distributed multi-node network radar is adopted. The system, through the use of space diversity, frequency diversity, polarization diversity and other technologies in different dimensions, can effectively overcome the problem of difficult detection of stealth targets based on backscattering characteristics. At this stage, the use of distributed network radar technology to detect stealth and other targets is still at the stage of theoretical exploration, and h...

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Application Information

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IPC IPC(8): G01S7/292G01S13/00G01S13/50
CPCG01S7/2927G01S13/003G01S13/50
Inventor 易伟王佰录李帅谌振华陈璐孔令讲杨晓波崔国龙
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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