基于特征空间的子阵级自适应和差波束测角方法  

Adaptive sum and difference beams angle measurement method at subarray level based on feature space

作　　者：曹运合[1] 曾丽 王宇 CAO Yun-he;ZENG Li;WANG Yu(National Key Laboratory of Radar Signal Processing,Xidian University,Xi'an 710071,China)

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室

出　　处：《吉林大学学报（工学版）》2019年第5期1735-1744,共10页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(61771367)

摘　　要：针对在有源干扰的情况下,自适应信号处理在抑制干扰的同时影响了和、差波束权矢量,使和差方向图发生畸变,和差单脉冲测角产生较大偏差,从而导致和差测角性能下降甚至失效的问题,提出了一种针对均匀子阵自适应差波束权值的方法,能在抑制干扰的同时得到高测角性能,自适应鉴角曲线与理想和差鉴角曲线基本重合,本文算法具有很好的稳健性,在存在指向误差和小快拍数条件下依然可获得很好的测角性能。同时与子阵级广义旁瓣相消的单脉冲测角方法相比较,本文方法体现了优势。最后,通过仿真结果验证了本文方法的有效性。In the case of active interference,while the interference is suppressed,adaptive signal processing affects the sum beam and difference beam weight vectors,the sum beam and difference beam distortion occur,which make sum-difference angle measuring method produce a larger deviation,leading to the performance degradation of sum-difference angle measuring method.To solve these problems,a method of adaptive difference beam weighting for uniform subarrays is proposed,which could get high angle measurement performance while restraining interference.So the adaptive angle detection curve coincides with idea sum and difference angle curve.The proposed method is robust and can achieve good angle measurement under the presence of pointing errors and small snapshots.Comparison to monopulse angle measurement method for generalized sidelobe cancellation at subarray level reflects the advantages of proposed method.The computer simulation proves the efficiency of the algorithm.

关 键 词：信息处理技术 单脉冲测角 和差波束 子阵 特征空间 

分 类 号：TN957.2[电子电信—信号与信息处理]