基于截获因子评价的双基前视SAR成像LPI设计  

LPI Design for Bistatic Forward-Looking SAR Imaging Based on Intercept Factor Evaluation

作　　者：刘通[1,2] 赵志钦 曹兰英[2] LIU Tong;ZHAO Zhiqin;CAO Lanying(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;AVIC Leihua Electronic Technology Research Institute,Wuxi 214063,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都611731 [2]中国航空工业集团公司雷华电子技术研究所,江苏无锡214063

出　　处：《雷达科学与技术》2022年第4期449-456,463,共9页Radar Science and Technology

基　　金：中国博士后科学基金(No.2019M661962)。

摘　　要：降低雷达辐射信号被截获概率,是保障机载平台战场生存与作战效能发挥的重要方面。本文结合双基雷达在低截获(LPI)方面的优势,提出了基于截获因子评价的移不变双基前视条带合成孔径雷达(SAR)成像LPI探测设计方法。考虑利用截获因子评价双基SAR成像的LPI性能,针对移不变双基前视条带SAR成像模式,简要分析了成像分辨率,推导了截获因子表达式,在保证成像性能前提下,以降低截获因子为目标设计了LPI探测方法,并进行了仿真验证。实验结果表明,本文提出的方法能明显改善机载火控雷达SAR模式的抗截获性能。Reducing the intercept probability of radar emitter signals is important to improve the battle survivability and operational effectiveness of airborne platform. In this paper, combining the advantages of bistatic radar in low probability of intercept(LPI) aspect, the LPI design method for shift-invariant bistatic forward-looking stripmap synthetic aperture radar(SAR) imaging based on interception factor evaluation is proposed to improve the anti-interception performance. Interception factor is considered to evaluate LPI performance of bistatic SAR imaging. Firstly, in allusion to the shift-invariant bistatic forward-looking stripmap SAR imaging mode, we briefly analyse the imaging resolution and derive the expression of interception factor. Then, on the premise of keeping imaging performance, we design the LPI detection method to reduce interception factor. Finally, simulation experiments are performed. The experiment results show that the proposed method can obviously improve the anti-interception performance of SAR mode of airborne fire control radar.

关 键 词：机载火控雷达 双基前视雷达 合成孔径雷达 截获因子 低截获探测设计 

分 类 号：TN959.73[电子电信—信号与信息处理]