基于小波变换的酉ESPRIT波束赋形技术研究  

Unitary-ESPRIT Beamforming Technology Based on Wavelet Transform

作　　者：赵季红[1,2] 贺丹[1] 王伟华[2] 曲桦[2] 雷佩 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710061 [2]西安交通大学电子信息学院,陕西西安710049

出　　处：《电子科技》2015年第9期6-10,共5页Electronic Science and Technology

基　　金：国家863计划基金资助项目(2014AA01A706;2014AA01A707);国家自然科学基金资助项目(61371087);新一代宽带无线移动通信国家重大专项基金资助项目(2013ZX0302010-003)

摘　　要：为了解决酉旋转不变子空间波束赋形算法在低信噪比环境下性能急剧下降的问题,提出了基于小波变换的酉ESPRIT算法。该算法在分析运算特点后有效调整运算顺序以控制计算量,利用小波变换去噪原理,能在低信噪比及阵元数有限的条件下正确估计来波方向。仿真结果表明,与传统ESPRIT算法及酉ESPRIT算法相比,该算法在低信噪比且不增加阵元数的情况下能更加准确地分辨来波方向。troduced and the Based on the analysis Unitary-ESPRIT algorithm, the idea of denoising by Wavelet Transform is in- Subspace Beamforming algorithm based on Wavelet Transform is put forward. The algorithm is a combination of Wavelet Transform denoising and Unitary-ESPRIT algorithm, using wavelet transform denoising prin- ciple to solve the problem that Unitary-ESPRIT algorithm cannot form a beamforming correctly because of wrong esti- mation of the wave direction under the condition of low Signal-to-Noise Ratio （SNR） and limited number of array ele- ments. Simulation results show that the algorithm can correctly distinguish the wave direction and form the correct beam under low SNR and limited number of array elements compared with the traditional ESPRIT algorithm and the Unitary-ESPRIT algorithm.

关 键 词：波束赋形 方向估计 小波变换 酉ESPRIT算法 

分 类 号：TN911[电子电信—通信与信息系统]