TD-SCDMA系统中智能天线波束形成的研究

Research on Beam Forming of Smart Antennas in the TD-SCDMA System

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Matlab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。

The beam-forming algorithm is the core and theoretical foundation of smart antennas. The beam forming technology of smart antennas has the advantage over the traditional switching beam forming technology in TD- SCDMA system that it can adjust the direction of the beam adaptively according to users＇ position, aim the main beam at the direction of arrival and sidelobe and zero subsidence at the interference. This paper expounds the basic tenets of smart antennas, introduces the capon algorithm and MUSIC algorithm as well as their applications in smart antenna beam-forming, which are carried out using Matlab simulation. It also covers the parameters set for the algorithm per- formance analysis. This paper provides a platform for future studies and is of referential value.