Active main lobe interference resisting method based on networked radar array synthesis

A networked radar and main lobe jamming technology, applied in the radar field, can solve the problem that the method of single-station radar anti-main lobe jamming cannot be directly used in networked radar and so on.

Inactive Publication Date: 2014-02-26
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the single-station radar anti-mainlobe interference method cannot be directly used in networked radars, and proposes an anti-active main-lobe interference method based on networked radar array synthesis, in order to realize the effective anti-mainlobe interference method for networked radars. Suppression of source main lobe interference to improve the detection performance of networked radar

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  • Active main lobe interference resisting method based on networked radar array synthesis
  • Active main lobe interference resisting method based on networked radar array synthesis
  • Active main lobe interference resisting method based on networked radar array synthesis

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Embodiment Construction

[0034] refer to figure 1 , the use scenario of the present invention includes a networked radar composed of P-part phased array node radars, and the baseline length of two adjacent node radars is D i,i+1 , insert L randomly placed array elements on the baseline of two adjacent radar nodes, and the array aperture of the i-th node radar is D i , the array aperture of the i+1th node radar is D i+1 , there is a target in the far field of space, and there is a Q active jammer near the target.

[0035] refer to figure 2 , the implementation steps of the present invention are as follows:

[0036] Step 1: Adjust the baseline length D of the radars of two adjacent nodes of the networked radar i,i+1 , so that it satisfies D i,i+1 ≤λR d / d t , and insert L randomly placed array elements on the baseline of two adjacent radar nodes, L>D i,i+1 sin(θ 0.5 ) / λ, where, θ 0.5 =50.7λ / (D i +D i,i+1 +D i+1 ) is the half-power beamwidth of the array, R d is the distance between the ta...

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Abstract

The invention discloses an active main lobe interference resisting method based on networked radar array synthesis. The method comprises the implementation steps that (1) the base length Di between two adjacent node radars of a networked radar is adjusted, i+1, and array elements which are arranged randomly are inserted into the base lines of two adjacent node radars; (2) the echo signals ri (t) and ri+1 (t) of two adjacent node radars and the echo signals ri and i+1 (t) of the random array elements are calculated; (3) the echo signals ri (t) and ri+1 (t) of two adjacent node radars and the echo signals ri and i+1 (t) of the random array elements are synthesized to obtain a set of new synthesized data rc (t); (4) the weight W of the new data rc (t) is calculated through targets, interference and noise information in the new data rc (t); (5) adaptive beamforming is carried out on the new synthesized data rc (t) through the weight W to obtain an antenna pattern and output signals after interference restraining. The method can effectively restrain active main lobe interference, has the advantages of being low in computation complexity and easy to construct and achieve, and can be used for target detection or tracking.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a method for resisting active main lobe interference, which can be used in a networked radar system, and under the condition of active main lobe interference, the interference from the main lobe of the radar antenna of each node of the networked radar can be prevented. The signal is effectively suppressed, and the detection and tracking performance of the networked radar under the condition of main lobe interference is improved. Background technique [0002] When the active jammer is located near the target, the jamming signal usually enters from the main lobe of the radar receiving antenna; when the radar detects a distant target, even if the jammer is far away from the target, the jamming signal will fall into the main lobe of the radar receiving antenna , thus forming active main lobe interference. When beamforming the data received by the radar receiving antenna, the existenc...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01S7/36
CPCG01S7/023G01S7/2813G01S7/2928
Inventor张娟张林让祁玉刘楠周宇
OwnerXIDIAN UNIV