基于三正交电偶极子天线的MUSIC估计算法  

MUSIC estimation algorithm based on tri⁃orthogonal electric dipole antennas

作　　者：肖雄 刘桐辛 姜春华[1] 杨国斌[1] XIAO Xiong;LIU Tongxin;JIANG Chunhua;YANG Guobin(Electronic Information School,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学电子信息学院,湖北武汉430072

出　　处：《现代电子技术》2022年第23期1-7,共7页Modern Electronics Technique

基　　金：国家自然科学基金项目(41727804);国家自然科学基金青年项目(42104151);湖北省自然科学基金青年项目(2021CFB134);中央高校基本科研业务费资助(2042021kf0023)。

摘　　要：针对应用于三正交电偶极子天线的传统MUSIC算法无法同时对包含空间角度和极化信息的回波信号进行四维谱峰搜索,提出一种基于三正交电偶极子天线的实虚部分离的MUSIC估计算法。利用三正交电偶极子天线导向矢量的特殊性,通过实虚部分离进行两次MUSIC谱峰估计,同时完成对波达方向和极化信息的估计。对算法可行性完成验证,详细仿真分析了信噪比、采样快拍数等对算法性能的影响。仿真结果表明,该算法能准确估计四维信息,将一次四维搜索(90×180×90×101)转换成一次三维搜索(90×180×90)和一次一维搜索(1×101),极大减小计算量,优化算法性能。The traditional MUSIC(multiple signal classification)estimation algorithm which is applied to tri⁃orthogonal electric dipole antennas fails to search the four⁃dimensional spectral peak of the echo signals containing spatial angle and polarization information at the same time,so a MUSIC estimation algorithm based on tri⁃orthogonal electric dipole antennas is proposed for real part and imaginary part separation.Based on the particularity of the steering vector of the tri⁃orthogonal electric dipole antennas,the MUSIC spectral peak is estimated for twice by real part and imaginary part separation,so as to estimate the DOA and polarization information at the same time.The feasibility of the algorithm is verified.The influence of signal⁃to⁃noise ratio(SNR)and the number of sampling snapshots on performance of the algorithm is simulated and analyzed in detail.The simulation results show that the propose algorithm can estimate the four⁃dimensional information accurately,convert a four⁃dimensional search(90×180×90×101)into a three⁃dimensional search(90×180×90)and a one⁃dimensional search(1×101),reduce the calculation burden greatly,and optimize its performance.

关 键 词：电磁波信号 波达方向估计 极化波 极化参数 MUSIC估计算法 空间谱 实虚部分离 导向矢量 

分 类 号：TN82-34[电子电信—信息与通信工程]