基于快速傅里叶变换技术的二维来波到达角估计算法研究  

Research on 2-D DOA Estimation Algorithms Based on FFT

作　　者：吴剑锋[1] 裴虎城 余勇军[1] 田锦昌 王友成 Wu Jianfeng;Pei Hucheng;Yu Yongjun;Tian Jinchang;Wang Youcheng(Beijing Electro-mechanical Engineering Institute,Beijing 100074,China;Science and Technology on Complex System Control and Intelligent Agent Cooperation Laboratory,Beijing 100074,China)

机构地区：[1]北京机电工程研究所,北京100074 [2]复杂系统控制与智能协同技术重点试验室,北京100074

出　　处：《战术导弹技术》2020年第5期15-19,共5页Tactical Missile Technology

基　　金：国家自然科学青年基金(61701465);国家自然科学面上基金(61971099)。

摘　　要：针对一种基于平面阵列天线的二维来波到达角估计算法进行研究,首先建立了矩形平面阵列天线的信号模型,并以此信号模型为基础推导了基于波束形成器技术的二维来波到达角估计公式,利用本文推导的功率谱估计公式与二维离散傅里叶变换公式这两者在表达式形式上的相似性,提出了使用二维快速傅里叶变换(FFT)完成矩阵相乘运算的方法,大大降低了信号处理过程中的计算量,最后的试验仿真结果表明:该算法具有较好的角度估计精度。A two dimensional( 2-D) direction of arrival( DOA) estimation algorithms based on planar array antenna is studied. Firstly,a signal model of rectangular planar array antenna is established. Based on this signal model,a 2-D DOA estiomation formula based on beam-former technology is derived. By using the similarity between the power spectrum estimation formula derived in this paper and the 2-D DFT formula in expression form,a method of matrix multiplication using 2-D FFT is presented. Thus,the amout of calculation in signal processing is greatly reduced. Finally,the simulation results show that the algorithm in this paper has good angle estimation accuracy.

关 键 词：平面阵列天线 波束形成器 二维快速傅里叶变换 来波到达角 功率谱 

分 类 号：TN911.72[电子电信—通信与信息系统]