| 信道估计误差场景MIMO ARQ系统中的模式切换 |
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| 引用本文： | 张正宇,邱玲. 信道估计误差场景MIMO ARQ系统中的模式切换[J]. 电子与信息学报, 2012, 0(4): 1007-1011 |
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| 作者姓名： | 张正宇 邱玲 |
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| 作者单位： | 中国科学技术大学个人通信与扩频实验室合肥230027 |
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| 基金项目： | 国家科技重大专项(2010ZX03002-003-01)资助课题 |
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| 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。
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| 关 键 词： | 信道估计误差 多输入多输出 自动请求重传 模式切换 |
Mode Switching for MIMO ARQ Systems with CEE |
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| g Zheng-yu,iu Ling. Mode Switching for MIMO ARQ Systems with CEE[J]. Journal of Electronics & Information Technology, 2012, 0(4): 1007-1011 |
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| Authors: | g Zheng-yu iu Ling |
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| Affiliation: | (Personal Communications Network and Spectrum Spread Laboratory, University of Science and Technology of China,Hefei 230027,China) |
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| Abstract: | 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. |
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| Keywords: | Channel Estimation Error(CEE) MIMO Automatic Repeat reQuest(ARQ) Mode switching |
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