空天基合成孔径雷达多域抗干扰技术综述

Review on Anti⁃Jamming Technology of Airborne/Space⁃Based SAR

合成孔径雷达(Synthetic Aperture Radar,SAR)是现代雷达技术发展的主要成就之一,具有全天候、全天时、高分辨率的特性,广泛应用于空基及天基各类平台。现代战场电磁环境日趋恶劣,电子战装备可以在多维度产生高强度、多样式和有针对性的电子干扰,极大制约了SAR作战效能的发挥,如何提高SAR抗干扰能力已成为当前国内外该领域研究热点。本文探讨了SAR常规抗干扰思路和优缺点,并以雷达信号发射和信号接收两个方面为主线,围绕空域、时域、频域、能量域、极化域以及数据处理域等多域,结合仿真和试验数据分析了典型空天基SAR抗干扰方法的实施效果,最后分析其未来的发展趋势,为以后的相关技术研究提供参考。

Synthetic aperture radar(SAR)is one of the significant achievements in the development of modern radar technology,with the characteristics of all⁃weather,all⁃day and high resolution,which is widely applied to airborne and space⁃based platforms.The electromagnetic environment of modern battlefield is becoming increasingly deteriora⁃ting,and electronic warfare equipment can generate high⁃intensity and targeted jamming in multiple dimensions,greatly restricting the effectiveness of SAR operations.How to improve the anti⁃jamming ability of SAR has become a hotspot in domestic and international researches.The anti⁃jamming methods in space domain,time domain,frequency domain,energy domain,polarization domain,and data processing domain based on signal transmission and reception are mainly studied in this paper.The advantages and disadvantages of conventional anti⁃jamming in SAR are discussed,and the implementation effects of common anti⁃jamming methods are illustrated by combing simulation and experimental data.Finally,the development trend of SAR is analyzed,providing reference for future relevant technology research.