基于复合阵列的矩阵循环重构DOA估计算法  

Matrix Circular Restruction Algorithm for DOA Estimation Based on Hybrid Arrays

作　　者：江云[1] 陈伟[1,2] 韩勇 Jiang Yun;Chen Wei;Han Yong(China Airborne Missile Academy,Luoyang 471009,China;National Key Laboratory of Air-based Information Perception and Fusion,Luoyang 471009,China;School of Information and Electrical Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471009 [2]空基信息感知与融合全国重点实验室,河南洛阳471009 [3]哈尔滨工业大学(威海)信息与电气工程学院,山东威海264209

出　　处：《航空兵器》2024年第5期96-102,共7页Aero Weaponry

摘　　要：相干源角度估计一直是困扰雷达角度测量的一个重要难题,基于均匀阵列假设提出了模式空间解相干算法,一定程度上解决了相干干扰条件下的目标角度估计问题,但是上述算法对复合阵列的适应性较差。针对复合阵列下相干多源测角问题,本文提出一种基于模式空间循环重构的解相关算法,利用圆阵外其他任意天线赋形空域滤波特性,在信号源数多于阵元数时较好地解决相干源角度估计问题。仿真试验结果表明,该算法能较好地解决复合阵列天线下的相干源测角问题,并且其角分辨性能优于传统算法。Angle estimation of coherent source has always been an important challenge in radar angle measurement.Based on the assumption of uniform array,some mode space-based decoherence algorithms is proposed to solve the problem of target angle estimation under coherent interference conditions.However,the above algorithms have poor adaptability to composite arrays.In the present work,a decorrelation algorithm based on matrix cyclic reconstruction is proposed for coherent multi-source angle measurement in composite arrays.By utilizing the spatial filtering characteristics of antenna outside the circular array,it effectively solves the problem of coherent source angle estimation when the number of sources exceeds the number of elements.The simulation results show that the proposed algorithm can effectively solve the angle measurement problem of coherent sources under composite array antennas,and its angular resolution performance is better than traditional algorithms.

关 键 词：波达角估计 复合阵列 模式空间 托普利兹矩阵 相干信号源 

分 类 号：TJ765[兵器科学与技术—武器系统与运用工程] TN911.7[电子电信—通信与信息系统]