| 多用户准正交空时分组码MIMO系统的下行链路预编码 |
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| 引用本文： | 曹颖鸿, 殷福亮, 陈喆. 多用户准正交空时分组码MIMO系统的下行链路预编码[J]. 电子与信息学报, 2009, 31(7): 1560-1564. doi: 10.3724/SP.J.1146.2008.00842 |
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| 作者姓名： | 曹颖鸿 殷福亮 陈喆 |
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| 作者单位： | 大连理工大学电子与信息工程学院,大连,116024;大连理工大学电子与信息工程学院,大连,116024;大连理工大学电子与信息工程学院,大连,116024 |
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| 摘 要： | 该文针对采用准正交空时分组码的多用户多输入多输出(QSTBC-MU-MIMO)系统，给出一种基于信漏噪声比(SLNR)准则的下行链路干扰抑制预编码方法。通过迭代优化，该文方法可以改善原始SLNR方法中由干扰用户增加所引起的系统性能下降问题，增强了算法对系统用户数的鲁棒性。由于在优化目标中考虑了系统噪声，该方法可通过恰当选取复比例因子来实现优化问题的简化求解。仿真结果验证了该文方法的有效性。
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| 关 键 词： | 准正交空时分组码 预编码 多用户 多输入多输出 下行链路 |
| 收稿时间： | 2008-07-03 |
| 修稿时间： | 2009-01-19 |
Downlink Precoding for Multi-user Quasi-orthogonal Space Time Block Coded MIMO System |
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| Cao Ying-hong, Yin Fu-liang, Chen Zhe. Downlink Precoding for Multi-user Quasi-orthogonal Space Time Block Coded MIMO System[J]. Journal of Electronics & Information Technology, 2009, 31(7): 1560-1564. doi: 10.3724/SP.J.1146.2008.00842 |
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| Authors: | Cao Ying-hong Yin Fu-liang Chen Zhe |
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| Affiliation: | School of Electronic and Information Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | In this paper, a downlink precoding scheme is proposed for the Quasi-orthogonal Space Time Block Coded Multi-User MIMO (QSTBC-MU-MIMO) system. Based on the SLNR (Signal-to-Leakage-Noise Ratio) maximization, this scheme minimizes the co-channel interference more efficiently by using an iterative optimization approach. It is robust to the number of users in the system. Furthermore, the influence of noise is taken into account, and thus a simple solution of the optimization problem can be achieved by choosing the complex scalars properly. Simulations demonstrate the effectiveness of the proposed scheme. |
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| Keywords: | Quasi-orthogonal Space Time Block Code (QSTBC) Precoding Multi-user MIMO Downlink |
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