摘要
本文提出了一种新的准正交设计方案。用该方案构造准正交STBC是在基于最大速率设计的OSTBC的基础上引入了非正交设计,以2×2Almouti复子矩阵为构造单元,以牺牲正交性为代价换得速率的提高。为了尽可能减小引入非正交性带来的译码复杂度的增加,对2×2Almouti复子矩阵采用两种不同的形式,从而可以使得最小欧氏距离的联合译码算法简化成为部分基于成对码字和其余的基于单个码字译码。同时对基于这种准正交设计方案构造的STBC进行了性能仿真。
A new quasi-orthogonal design method is given in this paper. The method based on design of OSTBC with maximal rate is used to construct a space-time block codes which introduced quasi-orthogonality. 2×2 Almouti complex submatrix was used as design unit. The code rate improved at cost of losing orthogonality. In order to decrease the decoder complexity we used 2×2 complex submatrix by two forms .Then the decoder algorithm which bases on minimum Euclid distance is divided into partial based on pair codes and the other based on single codes. The performance of the system is analyzed via simulation.
出处
《无线通信技术》
2005年第2期5-10,共6页
Wireless Communication Technology
基金
国家自然基金委和香港科技局联合资助项目(60131160742)
国家自然基金项目(60272057)
韩国三星电子公司资助项目。
关键词
空时分组
发送分集
无线通信
准正交设计
space-time block code
transmit diversity
quasi-orthogonal design
