一种天线分集的多载波CDMA上行链路方案  

Multicarrier DS-CDMA System with Space-time Codes

作　　者：施风[1] 陈明[1] 程时昕[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：《电路与系统学报》2004年第2期5-8,共4页Journal of Circuits and Systems

基　　金：芬兰诺基亚公司资助

摘　　要：多载波系统能克服多径信道频率选择性的影响,而应用多天线发射和接收能获得分集增益。本文提出了一种两天线发、多天线收的多载波CDMA上行链路系统方案。在发射端,空时块码被用来进行发射分集。对于多载波CDMA上行链路系统,不同的用户的信号经历了不同的多径衰落,信号间的正交性不再能够保持。本文提出了一种接收机方案,并讨论了几种联合检测方法来恢复所有用户在两个编码时刻发送的信息符号,并给出计算机仿真结果。Multicarrier systems can be used to combat channel frequency selectivity. Diversity gain can be improved by the application of multiple antennas. This paper deals with a MC-CDMA uplink system with two transmit, multiple receive antennas. At the transmitter, space-time block encoding is performed. For MC-CDMA uplink system, different users undergo different multipath fading. Therefor, the signals of different users are not orthogonal any more. Accordingly, a receiver scheme together with joint detection methods is proposed to recover all transmitted symbols of all users at two space-time encoding instants. Simulation results demonstrate good performance of proposed scheme.

关 键 词：多载波 空时编码 联合检测 

分 类 号：TN929[电子电信—通信与信息系统]