一种新的线性译码的准正交空时分组码方案  

A New QO-STBC Scheme with Linear Decoding

作　　者：张建忠[1] 李宏伟[1] 邓冬虎[1] 邵龙[2] 

机构地区：[1]空军工程大学电讯工程学院 [2]中国人民解放军94303部队61分队

出　　处：《哈尔滨理工大学学报》2012年第1期101-104,共4页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(60971100);陕西省自然科学基础研究项目(SJ08F10)

摘　　要：传统的准正交空时分组码可以实现全速率传输,但是不能获得最大的发送分集增益,而且译码复杂度相对较高,这主要是由于检测矩阵中存在干扰项造成的.为了解决这个问题,本文提出了一种新的准正交空时分组方案,该方案通过利用Givens旋转运算,将检测矩阵变换为一个对角阵,消除其中的干扰项,使得接收端可以采用线性方法来译码,从而既提高了系统的分集增益,又降低了译码的复杂度.仿真实验也验证了所提方案的优越性.A conventional QO-STBC scheme can achieve the full rate, but at the cost of transmission diversity gain and decoding complexity. These disadvantages of the conventional QO-STBC scheme are mainly a result of interference terms in the detection matrix. In order to solve the problem, this paper proposes a new QO-STBC scheme which transforms the original detection interference terms. The proposed meth matrix into a diagonal matrix using Givens rotation algorithm and eliminates od achieves improved diversity gain with respect to the conventional QO-STBC scheme, as well as a great reduction in decoding complexity by means of a linear decoding algorithm. Simulation also shows the superiority of the proposed scheme.

关 键 词：准正交空时分组码 分集增益 检测矩阵 线性译码 

分 类 号：TP911.7[自动化与计算机技术]