一种新的满分集度空时分组码编码方法  

A New Full-diversity Space-time Block Code

作　　者：刘胜男[1] 刘陈[1] 

机构地区：[1]南京邮电大学光电工程学院,江苏南京210003

出　　处：《通信技术》2008年第3期14-16,19,共4页Communications Technology

摘　　要：介绍了空时码在频率非选择性慢衰落信道下各种设计准则的推导过程,并对几种现有空时码进行了性能分析和比较。经过对DBOAST分组码进行改进推出了一种在四根发射天线下达到符号速率为2符号每信道利用的新的具有满发送分集度的空时分组码——ABCD分组码。ABCD结合了Alamouti和TAST分组码的结构。仿真结果表明ABCD码比TAST和DBOAST具有更大的二阶互信息,因而性能更优。In this paper, the inferential reasoning process of the space-time code design criteria is introduced in the frequency non-selective slow fading channels. Some performance analysis and comparison of several existing space-time codes are also done. Through reconstructing the DBOAST space-time block code, a new performance optimal space-time code called ABCD is proposed, in this case that there are 4 transmit antennas, which can achieve a rate of 2 symbols pcu and get full diversity. The new code combines the structure characteristics of Alamouti and Threaded Algebraic Space-Time （TAST） Block Codes. The simulation results show that the ABCD code provides larger second-order mutual information and thus is of a superior performance.

关 键 词：MIMO系统 空时码 球解码 分集度 

分 类 号：TN911[电子电信—通信与信息系统]