摘要
在MIMO系统的盲多用户检测技术中,信道估计是一个非常重要的步骤。现有的信道估计算法大多需要非常复杂的实现方式和巨大的计算量。本文在一篇已有文献的基础上给出了一种广义的空时编码设计方案,该方案除了拥有实现简单、计算量小等优点之外,还具有统计意义上的平衡性空时增益,这是原文献的算法所不具备的。除此之外,本文还从理论上给出了广义空时编码方案的最优化设计准则。在信道估计完成之后,再继续进行盲多用户检测。仿真结果显示,本文提出的最优化设计编码方案比起原先的方案具有更低的信号检测误码率和性能相当的信道估计误差,而算法复杂度则不变。
The channel estimation is important for a blind multiuser detection over a MIMO system. Most of existing channel estimation algorithms need to do a very complicated implementation scheme and have high computational complexity. In this paper, we propose a generalized space-time coding scheme. The proposed scheme has not only the advantages such as simple implementation, low computational complexity, but also the statistically balanced spatial diversity. Finally, we give an optimal space-time coding scheme design criteria. When the channel estimation has been finished, we will continue to do otherblind svstemsmUltiuserin detection.hit ~rr^r .~,The simulation, .. shows that the systems based on our optimal code design criteria ,-,,,tn~,＊＇-.-- ,~. _
出处
《电路与系统学报》
CSCD
北大核心
2012年第5期13-18,共6页
Journal of Circuits and Systems
关键词
MIMO系统
盲多用户检测
空时编码
盲信道估计
平衡性空时增益
MIMO system
blind multiuser detection
space-time coding
blind channel estimation
balanced spatial diversity
