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Anti-main lobe deception jamming method for waveform diversity array radar

A lobe deception and diversity array technology, applied in the field of radar, can solve the problems of high system complexity and platform resource occupation, and achieve the effects of saving platform space resources, suppressing interference, and improving anti-interference ability

Active Publication Date: 2019-03-22
XIDIAN UNIV
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Problems solved by technology

Although this multi-station radar can suppress main lobe interference, the system complexity of this system is too high, and the platform occupies too many resources

Method used

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  • Anti-main lobe deception jamming method for waveform diversity array radar
  • Anti-main lobe deception jamming method for waveform diversity array radar
  • Anti-main lobe deception jamming method for waveform diversity array radar

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Embodiment Construction

[0022] The present invention will be described more clearly and completely in conjunction with the accompanying drawings.

[0023] The present invention is a system that combines frequency diversity array FDA and multiple input multiple output MIMO radar, uses the FDA's freedom of distance dimension at the transmitting end, makes the target and interference have differences in the transmitting space frequency, and adopts subspace projection technology and signal power detection method The selection of interference samples is realized, and the target and interference are distinguished in the two-dimensional transmit-receive domain through beamforming technology.

[0024] Reference figure 1 , The implementation steps of the present invention are as follows:

[0025] Step 1. M transmitting antenna units transmit signals with frequency stepping, and N receiving antenna units receive echo data.

[0026] (1a) The signal transmitted by the m-th transmitting antenna unit is expressed as follo...

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Abstract

The invention discloses an anti-main lobe deception jamming method for a waveform diversity array radar, and mainly solves the problem that an existing radar has difficulty in suppressing main lobe deception jamming. According to the technical scheme, a waveform diversity array emits a stepped-frequency signal; after received echo data is subjected to filter matching, distance space-varying compensation is conducted in a transmitting-receiving two-dimensional domain; based on the subspace projection technology, a main lobe direction subspace is constructed and received, an echo signal power in the main lobe direction is obtained, and a power detection method is used for interference sample selection; according to a selected training sample, the adaptive or non-adaptive beamforming technology is used for calculating the beamforming weight, the weight is used for filter matching of the compensated echo data in the transmitting-receiving two-dimensional domain, and inhibition of main lobe deception jamming can be achieved. The method reduces the system complexity, saves platform resources, improves the estimation performance of an interference covariance matrix, improves the anti-jamming ability of the monostatic radar, and can be used in electronic countermeasure jamming.

Description

Technical field [0001] The invention belongs to the technical field of radars, and particularly relates to a method for resisting deceptive interference of the main lobe, which can be used for electronic interference countermeasures. Background technique [0002] With the development of modern electronic technology, the forms and means of electronic interference have become increasingly complex. Deceptive jamming, especially the main lobe deceptive jamming, is a signal similar to the target signal formed in a multi-dimensional space such as space, time, frequency, and polarization after the jammer intercepts and modulates the radar signal. This kind of deceptive jamming will induce the radar system to treat the jamming signal as a real target signal to achieve the effect of falsehood, which seriously affects the detection and tracking of the real target by the radar. [0003] In order to suppress the deceptive interference of the main lobe, researchers at home and abroad have prop...

Claims

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 许京伟康佳琳廖桂生曾操张玉洪杜佩鞠赵鹏程
Owner XIDIAN UNIV
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