基于极化敏感阵列抗有源干扰的测向算法  

Direction-finding Algorithm Against Active Interference Based on Polarization-sensitive Array

作　　者：沈千秋 赵勇武 夏新凡 吴迎春 奚银 SHEN Qianqiu;ZHAO Yongwu;XIA Xinfan;WU Yingchun;XI Yin(Shanghai Radio Equipment Research Institute,Shanghai 201109,China)

机构地区：[1]上海无线电设备研究所,上海201109

出　　处：《制导与引信》2023年第1期17-23,共7页Guidance & Fuze

摘　　要：基于传统的极化敏感阵列多重信号分类(multiple signal classification,MUSIC)空间谱估计测向算法,提出了结合极化滤波与斜投影算子的极化域-空域二维联合空间谱估计超分辨测向算法。与传统极化MUSIC空间谱估计算法相比,所提算法根据接收到的混叠脉冲信号的时域、极化域特性,进行信号前沿段与叠加段的分段波达方向(direction of arrival,DOA)估计。在估计出前沿段信号极化域与空域参数后,以此对信号叠加段进行极化滤波与斜投影算子处理,更为准确地估计了目标雷达与诱饵的DOA。仿真实验结果表明,该算法可有效抑制诱饵信号的影响,提高目标雷达信号DOA估计的准确度,实现多目标分辨。On the basis of the traditional polarization-sensitive array multiple signal classification(MUSIC)spatial spectrum estimation and direction-finding algorithm,a super-resolution direction-finding algorithm was proposed,which combined polarization filtering and oblique projection operator for two-dimensional joint spatial spectrum estimation in polarized domain and spatial domain.Compared with the traditional polarization MUSIC algorithm,the proposed algorithm performs direction of arrival(DOA)estimation on different segments such as the leading edge segment and the superposition segment according to the time domain and polarization domain characteristics of the received pulse signal.After estimating the polarization domain and spatial domain parameters of the signal in the leading edge segment,the polarization filtering and oblique projection operator are applied to the signal in the superposition segment.The simulation results show that the algorithm can suppress the influence of decoy signals effectively,improve the accuracy of DOA estimation of target radar signals,and achieve multi-target resolution.

关 键 词：极化滤波 斜投影 空间谱估计 极化多重信号分类 

分 类 号：TN957.52[电子电信—信号与信息处理]