不完全信道状态信息条件下多用户Turbo-BLAST迭代检测算法  

Iterative Detection Scheme for Multiuser Turbo-BLAST System with Imperfect Channel State Information

作　　者：陈小敏[1] 徐大专[1] 虞湘宾[1,2] 朱秋明[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,南京210016 [2]东南大学移动通信国家重点实验室,南京210096

出　　处：《电子与信息学报》2010年第4期790-793,共4页Journal of Electronics & Information Technology

基　　金：江苏省自然科学基金(BK2007192);东南大学移动通信国家重点实验室开放研究基金(N200904);高等学校博士学科点专项科研基金(20093218120021)资助课题

摘　　要：该文将空时多用户检测技术和Turbo-BLAST方案相结合,构造了基于CDMA技术的多用户Turbo-BLAST系统模型,提出了不完全信道状态信息条件下的解相关算法和迭代检测算法。在发送端将V-BLAST结构与CDMA技术相结合实现多路复用,在接收端利用空时多用户检测算法去除用户间干扰,得到期望用户的接收信号,然后采用考虑信道估计误差的软干扰抵消迭代检测算法,对期望用户的接收信号进行检测以去除天线间干扰。仿真结果说明,所提算法对于多用户Turbo-BLAST系统是有效的,可在不增加复杂度的条件下达到良好的迭代效果。The space-time multiuser detection scheme is applied to Turbo-BLAST system to form a multiuser Turbo-BLAST system. A scheme for de-correlating and interference cancellation detection technique is proposed in the presence of channel state information imperfection. At the transmitter,V-BLAST structure is combined with CDMA technique for spatial multiplexing. At the receiver,the de-correlating algorithm is employed to remove the multiuser interference first,and then the iterative interference cancellation scheme which takes the channel estimation errors into account is introduced to mitigate the co-antenna interference. Simulation results show that the proposed space-time multiuser model is effective in the presence of channel state information imperfection,it makes the detection of every user be comparatively independent,and benefits for application of the traditional Turbo-BLAST scheme.

关 键 词：空时多用户检测 多用户Turbo-BLAST 不完全信道状态信息 迭代检测 

分 类 号：TN92[电子电信—通信与信息系统]