Anti-range deception jamming waveform design method under spectrum coexistence

A technology of deception jamming and waveform design, applied in radio wave measurement systems, instruments, etc., to solve problems such as limited number of digital signal generator phases and performance loss

Active Publication Date: 2021-07-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

But for the radar transmitting system, the number of phases available to the digital signal generator is limited, if the waveform is designed without considering the constraints of the limited phase, performance loss will occur, especially when the number of phases is small

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  • Anti-range deception jamming waveform design method under spectrum coexistence
  • Anti-range deception jamming waveform design method under spectrum coexistence
  • Anti-range deception jamming waveform design method under spectrum coexistence

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Embodiment Construction

[0054] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0055] The steps of the invention include recognizing the radar mode to obtain prior information, establishing an optimization problem model, solving the optimization problem and obtaining an optimized waveform, transmitting the optimized waveform according to the radar parameters and processing the echo. In the modeling stage of the optimization problem, the method first considers the intra-pulse modulation waveform set on the basis of the specific modulation type of known interference, and the design criterion is to reduce the weighted autocorrelation integral sidelobe level and weighted cross-correlation integral level of the radar waveform set , to constrain the power spectral density of the waveform in the stopband frequency range to achieve spectral coexistence. At the same time, in order to ensure that the power amplifier works in a saturated stat...

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Abstract

The invention discloses an anti-range deception jamming waveform design method under spectrum coexistence. The method comprises the steps of obtaining prior information in a cognitive radar mode, establishing an optimization problem model, solving an optimization problem and obtaining an optimized waveform, and transmitting the optimized waveform according to radar parameters and processing echoes. In the optimization problem modeling stage, on the basis of known specific interference modulation types, an intra-pulse modulation waveform set is considered, and the design criterion is to reduce the weighted autocorrelation integral sidelobe level and the weighted cross-correlation integral level of the radar waveform set. In order to ensure that a power amplifier works in a saturated state and consider the finite phase number of a digital signal generator, constant modulus constraint and discrete phase constraint conditions are added to a designed waveform, and an optimization problem model is established. In the waveform optimization design stage, an imprecise alternating direction penalty method is used for solving the established quartic optimization problem, the obtained waveform can inhibit range deception jamming while ensuring spectrum coexistence, and the radar detection performance is improved.

Description

technical field [0001] The invention belongs to the technical field of radar anti-jamming, and in particular relates to waveform design and jamming suppression technology. Background technique [0002] In modern electronic warfare, due to the continuous improvement of radar countermeasure technology and the increasingly scarce spectrum resources, different forms of interference have seriously hindered the normal detection of radar targets, and it has become a severe challenge for radar designers to do everything possible to improve the anti-jamming performance of radar. Task. [0003] For distance deception jamming, the jammer intercepts and replicates the radar transmission signal and forwards it to the radar receiver, resulting in many false targets after radar matched filter detection. At the same time, with the increasing number of electromagnetic equipment such as military and civilian wireless communication and remote sensing detection, the electromagnetic spectrum in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 余显祥卜祎林瑜邱慧方学立张雷王睿甲张立东崔国龙孔令讲
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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