一种新的基于正交波束成型的用户反馈和选择方案  

Novel user selection and feedback strategy with orthogonal beamforming

作　　者：史林[1,2] 邱玲[2] 孙栋[2] 

机构地区：[1]军械工程学院光学与电子工程系,河北石家庄050003 [2]中国科学技术大学个人通信与扩频实验室,安徽合肥230027

出　　处：《系统工程与电子技术》2010年第12期2520-2523,共4页Systems Engineering and Electronics

基　　金：国家科技重大专项(2008ZX03003-004);国家科技支撑计划(2008BAH30B09)资助课题

摘　　要：在采用有限反馈的下行多天线多用户系统中,提出一种新的基于正交波束成型的用户反馈和选择方案。根据该正交波束成型方法的特点,推导出信道质量信息(channel quality information,CQI)的表达式,给出相应的反馈策略和用户选择方法。仿真结果表明,在实际系统中激活用户数比较少时,该方案的性能优于基于迫零波束成型(zero-forcing beamforming,ZFBF)有限反馈用户选择方案,为多天线多用户系统的应用提供了更好的参考。A novel user selection and feedback strategy is proposed in downlink multi-antenna multi-user systems with the orthogonal beamforming.The expression of the channel quality information（CQI） is derived,and the corresponding feedback and user selection method is provided.In practical system with small number of active users,the proposed strategy achieves higher throughput than the scheme of limited feedback and user selection based on zero-forcing beamforming（ZFBF）,which turns out to be a promising scheme for practical application of multi-antenna multi-user systems.

关 键 词：下行多天线多用户系统 有限反馈 正交预波束成型 用户选择 

分 类 号：TN929.5[电子电信—通信与信息系统]