基于CDMA系统智能天线的波束形成算法  

A Beam Forming Algorithm of Smart Antenna based on CDMA System

作　　者：苏久斌[1] 苏晓娟[1] 王光辉[1] 许存禄[1] 

机构地区：[1]兰州大学信息科学与工程学院

出　　处：《微计算机信息》2011年第11期100-101,95,共3页Control & Automation

摘　　要：在CDMA移动通信系统中,随着用户数量的增加,频谱资源显得日益匮乏.智能天线技术将空分多址(SDMA)引入到通信系统中,扩大了系统容量,因此如何将CDMA技术和智能天线技术结合在一起将是业界非常关注的一个问题。现代的通信系统为了提高频谱利用率,发射机不发送训练信号或参考信号,使得基于训练信号的传统自适应算法如LMS、RLS不能适用,因而业界把研究重点放在了盲波束形成算法方面。本文通过对比CDMA系统扩频码滤波前后协方差矩阵特点,提出了一种快速提取天线阵元最佳权矢量的方法,并与传统算法进行了仿真比较,结论是新算法稳定性和RLS算法相当,但计算量小。In the 3G mobile communication system, the technology of CDMA take the important position. How to find a method that can combine CDMA and smart antenna is a hot field now. In modern communication system, transmitter don’t transmit the training symbols and reference signal to improve the spectrum efficiency. Therefore, the adaptive algorithm such as LMS and RLS which need reference signal cannot be applied, as a result, the research of blind beam forming algorithm is more and more important now. In this paper, author presents a method of extracting weight vector through to between the variance-covariance matrix of before and after fiter contrast, and simulate the new algorithm.

关 键 词：扩频增益 自相关矩阵 最大特征值 

分 类 号：TN929.533[电子电信—通信与信息系统]