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相关信道下多用户MIMO系统联合收发机设计 被引量:1

Joint transceiver design for multiuser MIMO systems in the case of correlated channels
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摘要 采用块对角化算法的多用户MIMO系统,当用户信道矩阵的行向量之间存在强相关性时,系统容量急剧下降,针对这一缺点,讨论了两种衡量用户信道矩阵行向量间相关性大小的参量,提出一种联合收发机设计的方案.该方案的发射端基于块对角化算法,接收端采用去相关后处理算法,克服了用户信道之间相关性对系统容量的严重影响.仿真结果表明,随着用户信道之间相关性的增加,系统容量没有任何下降,有效地改善了相关信道下多用户MIMO系统的性能. In a block diagonal(BD) algorithm based multi-user MIMO downlink transmission system,a dramatic capacity loss is introduced when there is a strong correlation among row vectors of the different users' channel matrix.Specifically,two parameters for measuring the correlation are investigated.For the purpose of recovering the capacity loss,a joint transceiver design is proposed,where based on the BD algorithm at the transmitter side,a decorrelation postprocessing(DP) algorithm is invoked on the receiver side.Then computer simulation results show that the proposed joint transceiver design can efficiently improve the system capacity in the case of correlated channels.
出处 《西安电子科技大学学报》 EI CAS CSCD 北大核心 2010年第2期181-185,203,共6页 Journal of Xidian University
基金 国家杰出青年科学基金资助项目(60725105) 国家重点基础研究发展计划(973计划)课题资助项目(2009CB320404) "多体制信号识别与调制解调技术研究"(863计划)课题资助项目(2007AA01Z288) 长江学者和创新团队发展计划资助项目 国家自然科学基金资助项目(60572146) 高等学校博士学科点专项科研基金资助项目(20050701007) 高等学校优秀青年教师教学科研奖励计划资助项目 教育部科学技术研究重点资助项目(107103) 高等学校创新引智计划资助项目(B08038)
关键词 多用户MIMO 空间复用 相关信道 块对角 联合收发机设计 multiuser MIMO spatial multiplexing correlated channel block diagonalization joint transceiver design
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