相关信道下多用户MIMO系统联合收发机设计

doi:10.3969/j.issn.1001-2400.2010.02.001

J4 ›› 2010, Vol. 37 ›› Issue (2): 181-185+203.doi: 10.3969/j.issn.1001-2400.2010.02.001

• 研究论文 • 下一篇

Joint transceiver design for multiuser MIMO systems in the case of correlated channels

CHEN Rui¹;LI Jian-dong¹;LIU Wei¹;LI Chuan²

(1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071， China;
2. Research Inst. of Multimedia Technology, Xidian Univ., Xi'an 710071， China)

Received:2009-01-04 Online:2010-04-20 Published:2010-06-03
Contact: CHEN Rui

摘要/Abstract

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．

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

Abstract:

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.

Key words: multiuser MIMO, spatial multiplexing, correlated channel, block diagonalization, joint transceiver design

陈睿;李建东;刘伟;李川. 相关信道下多用户MIMO系统联合收发机设计[J]. J4, 2010, 37(2): 181-185+203.

CHEN Rui;LI Jian-dong;LIU Wei;LI Chuan. Joint transceiver design for multiuser MIMO systems in the case of correlated channels[J]. J4, 2010, 37(2): 181-185+203.

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