基于极化特征的抗箔条干扰方法研究  

Research on Anti-Chaff Jamming Method Based on Radar Echo Signal

作　　者：李尚生[1] 付哲泉 于晶[1] 李炜杰[1] 

机构地区：[1]海军航空工程学院电子信息工程系,山东烟台264001

出　　处：《雷达科学与技术》2016年第5期478-482,共5页Radar Science and Technology

摘　　要：针对箔条干扰导致制导雷达目标识别能力降低的实际问题,以及制导雷达希望充分利用目标雷达回波信号提高目标识别能力的迫切需求,建立了救生艇、飞机和服从空间球均匀分布的箔条云模型,将电磁场数值计算方法引入到不同类型目标的雷达回波信号以及极化特征的计算,得到不同目标在不同接收极化方式、不同观察角度下的雷达回波信号,以及不同目标之间的极化比特征差别,结果表明船、飞机等目标的雷达回波极化比远大于箔条干扰的回波极化比。研究结论有助于雷达导引头实现基于极化特征的目标识别,改善雷达性能和目标识别能力。In view of the practical problem of chaff resulting in the decrease of guidance radar target rec- ognition ability and the urgent need to raise the capacity of target recognition by making full use of the target＇s radar echo signal, the lifeboat model, aircraft model and chaff cloud model which obeys uniform dis- tribution are built. Then, numerical calculation method of electromagnetic field is introduced to the polariza- tion characteristics＇ calculation of different types of targets. As a result, the radar echo ~signals of different objectives at different viewing angles and the polarization ratio characteristic differences of different objectives under different receiving polarization mode are got. Results show that the polarization ratioes of radar echoes of the lifeboat and aircraft are greater than that of the chaff cloud. The research conclusions are of immense benefit to the implementation of target identification based on polarization characteristics for radar seeker, as well as improving the radar performance and the target recognition ability.

关 键 词：箔条云 极化比 数值计算 回波信号 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TN957[自动化与计算机技术—计算机科学与技术]