Anti-range deception jamming waveform design method under spectrum coexistence

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...

AI Technical Summary

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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