改进高速率全分集准正交差分空时码方案  

Improved High Rate and Full-diversity Quasi-orthogonal Differential Space-time Codes Scheme

作　　者：邓冬虎[1] 李宏伟[1] 朱仁飞[1] 于涛[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《无线电通信技术》2009年第6期1-3,共3页Radio Communications Technology

基　　金：国家自然科学基金(No.60672032);陕西省自然科学基础研究项目(No.2007F28)

摘　　要：传统的方案中,将准正交空时码(quasi-orthogonal space-time code)经过调制之后转换为酉空时码(unitary space-time code)再进行差分编码,但信息传输速率的提高会带来性能的严重下降。为了克服传统方案这一不足,给出一种引入幅值的修正方案,并且对幅值的选取也进行了说明。与传统的准正交差分空时码相比,所提方案提高了其信息传输速率,对误比特性能和信息传输速率进行了一个较好的折中。In traditional scheme, the modulated quasi-orthogonal space-time code is converted to unitary space-time code before differential encoding. But the performance decreases seriously when the data transmission rate becomes higher. In this paper,a new scheme is proposed,in which the amplitude modulation information is added to overcome this disadvantage, and how to choose the amplitude is also introduced. As eompared with traditional differential space-time codes, the information transmission rate is improved in this scheme, and a good balance between hit error rate and information transmission rate is achieved.

关 键 词：准正交空时码 酉空时码 差分检测 编码增益 误比特率 

分 类 号：TP911.7[自动化与计算机技术]