A Waveform Design Method for Anti-Range Deception Jamming under Spectrum Coexistence

Abstract

The invention discloses a waveform design method for anti-distance deception interference under spectrum coexistence, which includes acquiring prior information by recognizing the radar mode, establishing an optimization problem model, solving the optimization problem and obtaining the optimized waveform, transmitting the optimized waveform according to the radar parameters and analyzing the waveform. Echoes are processed. In the modeling stage of the optimization problem, on the basis of knowing the specific modulation type of interference, the intra-pulse modulation waveform set is considered, and the design criterion is to reduce the weighted autocorrelation integral sidelobe level and weighted cross-correlation integral level of the radar waveform set. In order to ensure that the power amplifier works in a saturated state, and considering the limited number of phases of the digital signal generator, constant modulus constraints and discrete phase constraints are added to the designed waveforms, and an optimization problem model is established. In the waveform optimization design stage, the established quadruple optimization problem is solved with an inaccurate alternating direction penalty method. The obtained waveform can suppress distance deception interference while ensuring spectrum coexistence, and improve radar detection performance.

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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