基于非理想信道信息的协作式空间复用系统性能分析与模式切换  

Performance analysis and mode switching between collaborative spatial-multiplexing and SIMO systems with imperfect CSI

作　　者：刘广宇[1] 杨曾[1] 贠超[1] 李明齐[1] 卜智勇[1] 

机构地区：[1]中国科学院上海微系统与信息研究所,上海200050

出　　处：《解放军理工大学学报（自然科学版）》2011年第1期7-12,共6页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家863计划资助项目(2006AA01Z280)

摘　　要：针对基于非理想信道信息的多用户多天线上行协作式空间复用系统,提出了一种自适应的在协作式空间复用与单发多收之间进行模式切换的混合传输方案。分别分析了协作式空间复用与单发多收在理想信道信息与非理想信道信息下的各态历经可达速率性能,获得了其闭式的边界结果;在两者分析结果比较的基础上,提出了一种基于可达速率边界的模式切换传输方案;通过数值仿真证实了分析结果的准确性,说明了在非理想信道信息下,高信噪比区域的协作式空间复用有必要切换为单发多收以实现可达速率的最大化。A hybrid transmission scheme based on dynamic mode switching between collaborative spatial-multiplexing（CSM） and single-input multi-out（SIMO） was proposed for multi-user multi-antenna uplink CSM systems with imperfect channel state information（CSI）.The achievable ergodic rates of CSM and SIMO were analyzed respectively,and the closed-form bounds derived.Performance of the two systems was analyzed,and a mode switching algorithm proposed based on the comparison of the analytical results.Simulation results validate the accuracy of the analysis and demonstrate the necessity of switching CSM to SIMO in high signal-to-noise ratio（SNR） region to maximize the achievable rates.

关 键 词：模式切换 协作式空间复用 单发多收 非理想信道信息 可达速率 

分 类 号：TN929.5[电子电信—通信与信息系统]