| 存在估计误差的有限反馈MIMO性能分析 |
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| 引用本文： | 杨喆,邱玲.存在估计误差的有限反馈MIMO性能分析[J].通信技术,2010,43(4):72-74,77. |
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| 作者姓名： | 杨喆 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,安徽,合肥,230027 |
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| 基金项目： | 国家863项目，国家973项目(NO:2007CB310602)资助课题 |
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| 摘 要： | 考虑的是利用有限反馈技术的下行多用户多天线系统。接收端通过信道估计获得信道状态信息,采用随机矢量量化信道信息并反馈码子的序号,发送端利用部分信道信息,采用波束成型的预编码技术实现多用户数据传输。考虑接收端信道估计存在误差,并对由此带来的系统性能影响进行分析,给出吞吐率损失的上界,以及使有限反馈系统保持固定空分复用增益,信道估计误差方差的限制条件和反馈比特数随发送功率的变化关系。
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| 关 键 词： | 有限反馈 随机矢量量化 信道估计误差 |
Performance Analysis of Multi-user MIMO Limited Feedback System in the Presence of Channel Estimation Error |
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| YANG Zhe,QIU Ling.Performance Analysis of Multi-user MIMO Limited Feedback System in the Presence of Channel Estimation Error[J].Communications Technology,2010,43(4):72-74,77. |
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| Authors: | YANG Zhe QIU Ling |
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| Affiliation: | YANG Zhe,QIU Ling (PCN&SS Lab,University of Science , Technology of China,Hefei Anhui 230027,China) |
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| Abstract: | A multi-user multiple-antenna downlink system with limited feedback is discussed.Firstly,the receiver,through channel estimation,acquires the Channel State Information(CSI),then the Random Vector Quantization is adopted to quantize the CSI to a codeword,whose index is then transmitted to the transmitter through the feedback channel.With the partial CSI,multi-user data is distributed by precoding in the transmitter.This paper tells of the Channel Estimation Error(CEE) and analyzes the system performance in t... |
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| Keywords: | limited feedback random vector quantization channel estimation error |
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