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Detection method for SMSP interference and C&I interference

A detection method and interference vector technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as detection methods that have not been studied

Active Publication Date: 2015-12-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The above methods are all aimed at the detection of traditional distance-towing interference. According to the published literature, there is no detection method for new multi-false target interference such as SMSP interference and C&I interference with complex intra-pulse modulation characteristics. Research

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  • Detection method for SMSP interference and C&I interference
  • Detection method for SMSP interference and C&I interference
  • Detection method for SMSP interference and C&I interference

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Embodiment Construction

[0023] Below take SMSP interference as an example to set forth the specific embodiment of the present invention, and concrete steps are as follows:

[0024] Preprocessing steps: the detection radar continuously transmits chirp signals outward, receives the echo signal at the same time, intercepts a single pulse to sample the echo signal, and forms the following binary hypothesis testing model:

[0025] h 0 :{r=αs+n

[0026] h 1 :{r=αs+βj+n

[0027] where r=[r(1),...r(N)] T is the echo vector, s=[s(1),…s(N)] T is the target signal vector, j=[j(1),…j(N)] T is the SMSP interference signal vector generated after the jammer intercepts the radar signal, n=[n(1),…n(N)] T is the zero-mean complex Gaussian noise vector whose covariance matrix is ​​M, N is the number of sampling points, α, β are unknown amplitude scalars, H 0 、H 1 Respectively represent the absence of interference and the existence of two hypothesis testing results.

[0028] Amplitude scalar parameter estimatio...

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Abstract

The invention discloses a detection method for SMSP interference and C&I interference, belonging to the radar signal detection technology field and particularly relating to the radar interference signal detection technology. The detection method disclosed by the invention comprises steps of utilizing a generalized likelihood ratio method to perform estimation on unknown amplitude parameters in an echo signal and an interference vector, respectively obtaining maximum likelihood estimation value, and bringing the unknown amplitude parameter and the interference vector maximum likelihood value into the generalized likelihood ratio detector to detect interference. The detection method for SMSP interference and C&I interference improves interference detection accuracy.

Description

technical field [0001] The invention belongs to the technical field of radar signal detection, and in particular relates to the radar interference signal detection technology. Background technique [0002] With the development of radar jamming technology, especially the emergence of active deception jamming technology based on digital radio frequency memory (DRFM), modern radars work in an increasingly complex electromagnetic interference environment, which affects the accuracy of radar target detection and target tracking. Stability poses a great challenge. Especially the SMSP interference and C&I interference that have appeared in recent years have dual interference characteristics of suppression and deception. After entering the radar receiver, multiple false targets can be generated in the distance, and the real target can be hidden in the false target group, making the radar Object detection is facing increasing difficulties, posing extremely severe challenges to the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
CPCG01S7/021
Inventor 崔国龙李乾刘加欢杨亚孔令讲杨晓波易伟郭世盛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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