• 学术论文 •

### 雷达导引头斜投影抗质心干扰性能分析

1. 国防科技大学电子信息系统复杂电磁环境效应国家重点实验室, 湖南长沙 410073
• 收稿日期:2012-12-20 修回日期:2013-07-01 出版日期:2014-03-25
• 作者简介:
• 杨勇 男，1985年7月出生于湖北省钟祥市，博士生，主要研究方向为复杂背景下雷达检测与抗干扰技术.E-mail：youngtfvc@163.com
• 基金资助:
• 国家自然科学基金 (No.61372170）; 国防科技大学优秀研究生创新资助项目 (No.B110406）; 湖南省研究生科研创新项目 (No.CX2011B021）

### Analysis of Anti Centroid Jamming Performance for the Radar Seeker Using Oblique Projection

YANG Yong, XIAO Shun-ping, FENG De-jun, ZHANG Wen-ming

1. State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha, Hunan 410073, China
• Received:2012-12-20 Revised:2013-07-01 Online:2014-03-25 Published:2014-03-25

Abstract: Target indicated angle of radar seeker biases off the target when the centroid jamming such as chaff cloud or corner reflector presents,which makes the missile miss the target.To address this problem,oblique projection is employed to suppress the centroid jamming in this paper,where oblique projection operator is constructed by utilizing the polarization parameters of the target and the jamming.Since the polarization parameters of the target and the jamming are difficult to be estimated accurately in reality,influences of the estimation errors of the polarization parameters of the target and the jamming on the output target signal and jamming after oblique projection are mainly analyzed.Analytic expressions of output signal errors of the target and the jamming are presented.Based on this,the output interference-to-signal ratio and angle measurement error after oblique projection are further derived.Theoretical derivation and simulation results both demonstrate that angle measurement error of radar seeker after oblique projection is unrelated to the estimation error of the polarization parameters of the target,and is related to the estimation error of the polarization parameters for the jamming.Oblique projection can suppress the jamming to some extent and is good for enhancing the angle measurement accuracy of radar seeker if the estimation errors of the polarization parameters of the jamming are within the range of minus ten degree to ten degree.