摘要
该文研究了多输入多输出(MIMO)系统自适应模式切换问题,综合考虑了实际系统中4个影响模式切换的因素:信道估计误差,系统丢包率限制,自动请求重传技术,离散的发送速率及实际的编解码性能。论文推导了复用和分集模式的吞吐率表达式,提出了吞吐率最大化的MIMO模式切换方法。仿真表明该文提出的自适应模式切换方法能明显提升系统的性能,所考虑的4个因素会对两种传输模式性能以及切换点产生影响。
The mode switching is investigated for MIMO systems with considering four practical factors including channel estimation error,packet loss probability constraint,Automatic Repeat reQuest（ARQ） technique,discrete transmission rate and practical codec performance.The closed-form expressions of throughput are derived for spatial multiplexing and diversity modes,based on which the adaptive throughput-based mode switching is proposed.Numerical results show that the proposed scheme outperforms the fixed transmission mode schemes and the considered factors affect the throughput and the mode switching point.
出处
《电子与信息学报》
EI
CSCD
北大核心
2012年第4期1007-1011,共5页
Journal of Electronics & Information Technology
基金
国家科技重大专项(2010ZX03002-003-01)资助课题
