CDMA中一种新的波束形成算法  

A Novel Beamforming Algorithm in CDMA

作　　者：傅永生[1] 沈连丰[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《应用科学学报》2003年第4期344-348,共5页Journal of Applied Sciences

基　　金：国家自然科学基金资助项目(60072016);教育部科学技术研究重点项目(99176)

摘　　要：基于CDMA环境提出了一种新的波束形成算法,并且以此形成二维Rake合并器.这种新的方法,根据最大信号噪声干扰比准则推导出计算权矢量的公式,将求导向矢量再求逆的两步问题转化为直接求Hermit阵的最大广义特征值和特征向量,且使用解扩后数据计算干扰加噪声的协方差阵.该法计算量小,数据存储量小,不需要训练序列和参考信号,步骤简单且性能优于导频辅助法,计算量小于码滤波法.此法可应用于第三代移动通信系统中快衰落环境下的波束形成.A novel method for beamforming is proposed in a CDMA mobile communication environment and a beamformerrake receiver is formed on this basis. The method based on maximum signal to interference and noise ratio (MSINR) criteria converts the conventional two steps problem of seeking the invertion of matrix after knowing the signature vector to computing the largest generalized eigenvector directly. The main advantages of the new technique are that the computation load is reduced, the storage memory is compressed and the training signals and reference signal are not necessary in the procedure. Compared with the code filter algorithm, it is superior to the pilot aided method and its computation load is lower than that of the code filter method. It will be applied in the beamforming of fast fading environment in the third generation mobile communication.

关 键 词：CDMA 波束形成算法 Rake合并 最大信号噪声干扰比准则 广义特征矢量 智能天线 

分 类 号：TN929.533[电子电信—通信与信息系统] TN821.91[电子电信—信息与通信工程]