| 唐冬,杨亮,黄智伟,吕明霞.半相关平坦衰落下MIMO系统容量分析[J].南华大学学报(自然科学版),2005,(2):41~45.[.Capacity of MIMO Systems in Semicorrelated Flat Fading Environment[J].Journal of University of South China(Science and Technology),2005,(2):41~45.] |
| 半相关平坦衰落下MIMO系统容量分析 |
| Capacity of MIMO Systems in Semicorrelated Flat Fading Environment |
| 修订日期：2004-04-30 |
| DOI： |
| 中文关键词: 多输入多输出（MIMO） 信道状态信息 半相关 指数相关 |
| 英文关键词:MIMO,CSI,Semi-correlation,Exponential Correlation |
| 基金项目: |
| 唐冬 杨亮 黄智伟 吕明霞 |
| [1]南华大学电气工程学院,湖南衡阳421001／／中山大学信息科学与技术学院,广东广州510275 [2]中山大学信息科学与技术学院,广东广州510275 [3]南华大学电气工程学院,湖南衡阳421001 [4]衡阳市公路管理局,湖南衡阳421001 |
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| 中文摘要: |
| 导出半相关平坦衰落条件下发送端已知信道状态信息(CSI)时多输入多输出(MIMO)无线通信系统平均容量的表达式，并基于此表达式，分析指数相关模型下系统的容量．研究结果表明：在指数相关模型下，当邻近天线元之间的相关系数小于0．5时，容量的减小可以忽略；在一些特定情况下，相关衰落与不相关衰落环境相比，前者能提供更好的性能；发送端已知CSI，只是在低发送功率下能明显改善系统性能。 |
| 英文摘要: |
| This paper derives the expression of mean capacity of MIMO systems for semi-correlated flat-fading and the CSI at the transmitter. Based on the expression, we use exponential correlation model to investigate the system model. The research results show: for the exponential model, the capacity loss is negligible when the correlation coefficient between two adjacent antennas is as large as 0.5;In some particular cases, correlated fading may offer better performance than uncorrelated fading; Knowing CSI at the transmitter only makes function under the condition of low transmitted power. |
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