MIMO-MAC中改进的空时码传输方案  

Improved Space-Time Coded Transmission Scheme for MIMO-MAC

作　　者：田心记[1] 倪水平[1] 胡紫巍[2] 张延良[1] 

机构地区：[1]河南理工大学计算机科学与技术学院,河南焦作454000 [2]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2013年第4期95-98,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61104079;61202286)

摘　　要：为了消除两用户的多输入多输出多址接入信道(MIMO-MAC)中用户间的干扰,提出了一种基于有限反馈的空时码传输方案.每个用户采用基于相位旋转的速率为2的空时码,每个码字自身需要一个反馈角度,对接收信号进行简单相加后可消除多用户干扰,实现全分集.与MIMO-MAC中已有的基于有限反馈的空时码传输方案相比,所提方案增大了接收端的信噪比,提高了系统的可靠性.An improved space-time coded transmission scheme with limited feedback is proposed in order to eliminate interference for two-user multi-input multi-output multiple access channels （MIMO-MAC）. Each user employs rate-2 space-time block code with phase rotation, which requires a phase feedback. The multiuser interference is eliminated through simple addition of the received signal, and full diversity is realized. The signal to noise ratio is increased in the proposed scheme and the system performance is improved compared with the existing space-time coded transmission scheme with limited feedback.

关 键 词：多输入多输出 多址接入信道 空时码 多用户干扰 有限反馈 

分 类 号：TN911.22[电子电信—通信与信息系统]