| 存在反馈周期和反馈时延的自适应调制MIMO系统 |
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| 引用本文： | 宋扬,常永宇,杨大成.存在反馈周期和反馈时延的自适应调制MIMO系统[J].电子与信息学报,2007,29(2):301-304. |
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| 作者姓名： | 宋扬 常永宇 杨大成 |
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| 作者单位： | 北京邮电大学电信工程学院,北京,100876 |
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| 摘 要： | 该文研究了反馈信道信息存在的反馈周期和时延对自适应调制MIMO系统的影响，分析了基于奇异值分解的等效并行衰落信道特性，并且给出了接收机的检测方法和一种简化的检测顺序。研究表明，等效并行衰落信道在一定的时间间隔内具有较大的相关性；接收机采用迫零和干扰消除方法可明显提高系统性能。
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| 关 键 词： | MIMO 自适应调制 反馈 分配算法 |
| 文章编号： | 1009-5896（2007）02-0301-04 |
| 收稿时间： | 2005-07-22 |
| 修稿时间： | 2005-12-09 |
Adaptive Modulation for MIMO Systems with Channel State Information Feedback Periods and Delays |
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| Song Yang,Chang Yong-yu,Yang Da-cheng.Adaptive Modulation for MIMO Systems with Channel State Information Feedback Periods and Delays[J].Journal of Electronics & Information Technology,2007,29(2):301-304. |
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| Authors: | Song Yang Chang Yong-yu Yang Da-cheng |
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| Affiliation: | School of Telecomm. Eng., Beijing Univ. of Posts and Telecomm., Beijing 100876, China |
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| Abstract: | This paper investigates the impact of feedback period and delay on the performance of Multiple-Input Multiple-Output(MIMO)systems with adaptive modulation,and analyzes the characteristics of the equivalent parallel fading subchannels obtained by Singular Value Decomposition(SVD).Its receiver detection method and a simplified detection order are given as well.The results show that the correlation of the subchannels' fading remains large within a certain period of time.System's performance can be improved significantly when the Zero Forcing(ZF)and Interference Cancellation(IC)techniques are adopted at the receiver. |
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| Keywords: | MIMO Adaptive modulation Feedback Loading algorithm |
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