一种新的准正交空时分组码的设计  

A Novel Quasi-orthogonal Space-Time Block Codes

作　　者：王超[1] 李雅珍[2] 肖丽萍[3] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004 [2]东北大学秦皇岛分校计算机工程系,河北秦皇岛066004 [3]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《通信技术》2008年第8期90-91,94,共3页Communications Technology

摘　　要：根据正交设计理论,当发送天线数大于2时,不存在可以获得完全分集增益和全速率的复正交空时分组码。对空时分组码采用准正交设计,能够保证数据以全速率传输,但是会使其误码性能降低。文章在对准正交空时分组码(QOSTBC)结构研究的基础上,提出了一种全速率的四发射天线准正交空时分组码,并给出了基于最大似然译码方法。仿真结果表明,文章方案与已有典型的Jafarkhani准正交空时分组码相比,在高信噪比时有更好的误码性能。According to the theory of orthogonal design, a complex orthogonal space-time block code that provides full diversity and full transmission rate could not be realized for more than two antennas. Based on quasi-orthogonal design, the space-time block codes that obtain full transmission rate may degrade the performance. This paper, by using the quasi-orthogonal design method, proposes a novel full rate space-time block code for four transmit antennas based on quasi-orthogonal design, including a maximum-likelihood （ML） decoding algorithm. Simulation results show that the scheme has better Bit Error Rate （BER） performance as compared to the existing typical codes at high SNR.

关 键 词：准正交 全速率 最大似然译码 

分 类 号：TN911.22[电子电信—通信与信息系统]