空时分组码Alamouti方案性能研究  

Performance analysis for Alamouti scheme of space-time block code

作　　者：宫定发[1] 钱学荣[1] 陈沿明[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《重庆邮电大学学报（自然科学版）》2008年第2期143-147,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

摘　　要：介绍了空时分组码Alamouti方案的编译码原理,在瑞利衰落信道下,采用2种方法推导了多接收天线系统MPSK调制的比特差错率(BER)闭式解。理论上推导出2根发送天线m根接收天线的Alamouti方案与1根发送天线2m根接收天线的最大比值合并(MRC)接收分集的分集增益相同。系统仿真结果与理论值吻合,得到的闭式解是系统性能评估的准确结果。The encoding and decoding principles of Alamouti scheme of space-time block code （STBC） are introduced. In Rayleigh fading channel, the closed-form solutions for bit error rate （BER） of MPSK modulated systems with multiple receiving antennas are derived using two different methods. It is deduced theoretically that the Alamouti scheme with two transmit and m receive antennas has the same diversity gain as a Maximal-ratio combining （MRC） receive diversity scheme with one transmit and 2m receive antennas. Simulations show that the practical error rates accord with the proposed theoretical results, so the closed-form solutions are accurate results for performance evaluation.

关 键 词：空时分组码 比特差错率(BER) 瑞利信道 多输入多输出 

分 类 号：TN911.22[电子电信—通信与信息系统]