用于分布式天线的选择分集2D-RAKE接收机  

2D-RAKE receiver with selection diversity in distributed antenna systems

作　　者：黄开枝[1] 王京[1] 陈国安[1] 王有政[1] 

机构地区：[1]清华大学电子工程系微波与数字通信技术国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第1期39-42,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(041306632)

摘　　要：针对分布式天线系统,提出了一种新的空时二维-RAKE(2D-RAKE)接收机方案,使用M个L-分支选择合并器(SC),每个SC的输出送入一个有LR个抽头的RAKE接收机。作者分析了在频率选择性Nakagami衰落信道中,该接收机的误比特率特性,讨论了不同衰落参数下不同L,M和LR组合对系统性能的影响。数值分析表明:与常规2D-RAKE接收机相比,该机不仅可以利用多个天线的空间分集合并改善系统的性能,而且明显降低了系统复杂度,因此可以在分布式天线系统中利用2D-RAKE接收机改善系统性能。A new twodimensional RAKE (2DRAKE) receiver that uses M groups of Lbranch selection combiners (SC) and LR RAKE fingers for each SC was developed for distributed antenna systems. A closedform expression of the average bit error rate in a frequencyselective Nakagami fading channel was derived. The effect of different combinations of L, M and LR on the system performance was also evaluated for different fading parameters. A numerical simulation indicates that, compared with a conventional 2DRAKE receiver, this receiver provides significantly improved performance using space diversity reception with the same or reduced complexity. Therefore, 2DRAKE receiver technology can be used in distributed antenna systems.

关 键 词：选择分集 2D-RAKE接收机 分布式天线 二维-RAKE接收机 衰落信道 无线通信系统 CDMA 

分 类 号：TN929.533[电子电信—通信与信息系统]