TD_SCDMA系统中智能天线波束形成的研究.pdfVIP

电子科技 2008年第 21卷第 11期 TDSCDMA 1 1 2 , , ( 1西安建筑科技大学 机电工程学院, 陕西 西安 710055; 2 中兴通讯股份有限公司西安分公司, 陕西 西安 710065) 波束形成算法是智能天线的核心和理论基础, TD- SCDMA系统中应用的智能天线技术与传统的切 换波束技术相比, 最大的优点在于可以自适应的根据用户的方位调整波束方向, 将主波束对准来波方向( DOA ), 而将旁瓣和零陷对准干扰文中先阐述了智能天线的基本原理, 介绍了 Capon算法和MUSIC算法以及它们在智 能天线波束形成中的应用, 进而用M atlab进行了数值仿真, 并且讨论了相关参数设置对于算法性能的分析文 章为以后的理论研究提供了平台, 对于今后的理论研究有一定的指导意义和参考价值 TD - SDMA; 智能天线; 波束下顷; Capon算法; MUSIC算法 + T 821 91 A 1007- 7820( 2008) 11- 005- 04 Research on B eam Form ing of Sm art A ntennas in the TDSCDM A Sy stem 1 1 2 ZhaoYu, Yuan Sicong, W angYanwen ( 1. School of Electrical Engineering, X ianUniversity ofArchitecture Technology, X ian 710055, China; 2. Department fo Xian ZTE Corporation, Xian 710065, China) Abstract The beamforming algorithm is the core and theoretical foundation of smart antennas. The beam forming technology of smart antennashas the advantage over the traditional switching beam form ing technology inTD SCDMA system that it can adjust the direction of the beam adaptively according to usersposition, ami themain beam at the direction of arrival and sidelobe and zero subsidence at the interference. Thispaper expounds thebasic tenets of smart antennas, introduces the capon algorithm andMUSIC algorithm aswell as their applications in smart antenna beamforming, which are carried out usingMatlab smi ulation. It also covers the parametersset for the algorithm per formance analysis. Thispaper providesa platform for future studies and isof referential value. K eyw ords TDSCDMA; smart antennas; form ing; Capon algorithm; MUSIC algorithm , ,