变极化干扰对广义旁瓣对消的影响  

Influences of Variable Polarization Jamming on Generalized Sidelobe Canceller

作　　者：张建中 文树梁[1] 沙明辉 高红卫[1] 廖胜男 ZHANG Jian-zhong;WEN Shu-liang;SHA Ming-hui;GAO Hong-wei;LIAO Sheng-nan(Beijing Institute of Radio Measurement,Beijing 100854,China;The Second Research Academy of CASIC,Beijing 100854,China)

机构地区：[1]北京无线电测量研究所,北京100854 [2]中国航天科工集团有限公司第二研究院,北京100854

出　　处：《现代防御技术》2019年第4期77-82,共6页Modern Defence Technology

摘　　要：敌方实施变极化干扰时,自适应波束形成的最优权矢量失配,抗干扰性能急剧恶化,利用广义旁瓣对消模型,对变极化干扰引起的性能改变进行定量描述。首先利用广义旁瓣对消模型求解最优权矢量,接着引入变极化产生的幅度、相位相对改变量,阵列单元幅相扰动,然后计算共极化干扰和交叉极化干扰在不同采样数据权值下的性能改善因子。仿真实验表明,变极化干扰能有效影响自适应波束形成阵列,恶化性能改善因子,大信噪比间歇采样干扰尤为突出。When radar is faced with random polarization jamming from hostile forces, the optimal weight vector of adaptive beam-forming cannot eliminate interference, so the anti-jamming performance may degrade greatly. In order to describe this phenomenon quantitatively, a performance improvement factor (PIF) is introduced. Firstly, the optimal weight is calculated by generalized sidelobe canceller (GSC) model, and average polarizability loss and magnitude-phase disturbance of receiving voltage caused by variable polarization is drawn into, and then the PIF of co-polarization and cross polarization are computed under weighs of different sampling data. The simulation results show that the variable polarization jammer can interfere adaptive beam-forming array effectively, and deteriorate the PIF, especially under interrupted-sampling interference in high SNR.

关 键 词：变极化干扰 广义旁瓣对消 改善因子 幅相扰动 自适应波束形成 

分 类 号：TN973[电子电信—信号与信息处理]