Anti-active main lobe jamming method based on networked radar array synthesis

A technology of networked radar and array synthesis, applied in the field of radar, can solve the problem that the anti-mainlobe interference method of single-station radar cannot be directly used in networked radar and other problems

Inactive Publication Date: 2015-09-30
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • 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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  • Anti-active main lobe jamming method based on networked radar array synthesis
  • Anti-active main lobe jamming method based on networked radar array synthesis
  • Anti-active main lobe jamming 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 anti-active main lobe interference method based on networked radar array synthesis. The implementation steps are: (1) Adjust the baseline length Di,i+1 of the two adjacent radar nodes of the networked radar and insert randomly placed array elements on the baselines of the two adjacent radar nodes; (2) Calculate the The echo signals ri(t) and ri+1(t) of the radar and the echo signals ri,i+1(t) of the random array elements; (3) The echo signals ri(t) of the adjacent two node radars Synthesize with ri+1(t) and the echo signal ri,i+1(t) of the random array element to obtain a new set of synthesized data rc(t); (4) use the new data rc(t) Calculate the weight W of the new data rc(t) based on the target, interference and noise information; (5) Use the weight W to perform adaptive beamforming on the synthesized new data rc(t) to obtain the antenna pattern after interference suppression and output signal. The invention can effectively suppress active main lobe interference, and has the advantages of low computational complexity and easy engineering realization, 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 & AuthorityPatents(China)
IPC IPC(8): G01S7/36
CPCG01S7/023G01S7/2813G01S7/2928
Inventor张娟张林让祁玉刘楠周宇
OwnerXIDIAN UNIV