电子学报 ›› 2015, Vol. 43 ›› Issue (3): 489-495.DOI: 10.3969/j.issn.0372-2112.2015.03.011

• 学术论文 • 上一篇    下一篇

基于空时联合约束的机载雷达STAP单脉冲角度估计方法

陈功1,2, 谢文冲1,2, 王永良1   

  1. 1. 空军预警学院, 湖北武汉 430019;
    2. 电子信息控制重点实验室, 四川成都 610036
  • 收稿日期:2013-12-31 修回日期:2014-06-12 出版日期:2015-03-25 发布日期:2015-03-25
  • 通讯作者: 王永良
  • 作者简介:陈 功 男,1991年生于江西南昌,硕士研究生,主要研究方向为机载雷达信号处理、空时自适应处理等. E-mail:reynchen059@gmail.com;谢文冲 男,1978年生于山西运城,2006年获国防科技大学信号与信息处理专业工学博士学位,现为空军预警学院副教授,获国家技术发明二等奖1项,主要研究方向为机载雷达信号处理、空时自适应处理等. E-mail:xwch1978@aliyun.com
  • 基金资助:

    国家自然科学基金(No.60925005,No.61102169)

Space-Time Adaptive Monopulse Angle Estimation Approach for Airborne Radar Based on Space-Time Joint Constraint

CHEN Gong1,2, XIE Wen-chong1,2, WANG Yong-liang1   

  1. 1. Early Warning Academy, Wuhan, Hubei 430019, China;
    2. Science and Technology on Electronic Information Control Laboratory, Chengdu, Sichuan 610036, China
  • Received:2013-12-31 Revised:2014-06-12 Online:2015-03-25 Published:2015-03-25

摘要:

对现有STAP(Space-Time Adaptive Processing)单脉冲角度估计方法存在单脉冲比失真及目标多普勒失配时角度估计性能严重下降的问题,本文从数学上分析了常规STAP单脉冲方法的失效机理,并基于机载雷达杂波的空时耦合特性,将差波束约束条件扩展到空时二维空间,提出了基于空时联合约束的STAP单脉冲角度估计方法,将单脉冲曲线延伸为单脉冲曲面,通过空时联合约束显著提高了目标角度估计的精度和稳健性.计算机仿真结果验证了本文方法的有效性.

关键词: 机载雷达, 空时自适应处理, 角度估计, 空时联合约束, 单脉冲曲面

Abstract:

Because a monopulse ratio is distorted and a Doppler mismatch may occur, the performance of the existing space-time adaptive monopulse angle estimation is degraded severely.This paper gives mathematical analysis of the failure mechanism of the conventional space-time adaptive monopulse method.In view of the space-time coupling characteristic of airborne radar clutter, this paper expands a constraint for difference beam to a space-time domain.A novel space-time adaptive monopulse angle estimation approach based on the space-time joint constraint is proposed, and a monopulse curve is extended to a monopulse surface.The accuracy and robustness of angle estimation are improved by the space-time joint constraint.Simulation results verify the validity of the novel method.

Key words: airborne radar, space-time adaptive processing (STAP), angle estimation, space-time joint constraint, monopulse surface

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