摘要
针对正交空时分组码没有编码增益的问题,该文提出了基于超正交码的最优预编码设计方案,即在基于正交空时分组码的多输入多输出系统预编码中引入了超正交码的思想。在保持码字最大分集增益和最高码率的同时,增加了正交码矩阵的个数,获得了编码增益。仿真结果表明,该文建议的基于超正交码的多输入多输出预编码系统的性能相比于未经预编码的多输入多输出系统,以及基于正交空时分组码多输入多输出预编码的系统性能有了明显改善。
For the problem that orthogonal space-time block codes scheme don＇t have coding gain,this paper puts the design scheme of optimal pre-coding based on the super orthogonal codes forward,which introduces the idea of the super orthogonal codes to the MIMO system＇s pre-coding.This method not only maintains these code words in the biggest diversity gain and the highest bit rate,but also increases the number of orthogonal codes matrix and gets the coding gain.Simulation results show that,the performance of the proposed MIMO pre-coding system based on super orthogonal codes has improved significantly comparing with the performance of the MIMO system without pre-coding and the MIMO pre-coding system based on OSTBC.
出处
《杭州电子科技大学学报（自然科学版）》
2011年第5期107-110,共4页
Journal of Hangzhou Dianzi University：Natural Sciences
关键词
预编码
正交空时分组码
超正交码
成对差错概率
编码增益
pre-coding
orthogonal space-time block codes
super orthogonal codes
pair-wise error
coding gain
