| Precoding for Multiuser Spatial Multiplexing MIMO Downlink |
| |
| 作者姓名： | 张碧军 朱光喜 刘应状 |
| |
| 作者单位： | Department of Electronics and Information Engineering Huazhong University of Science and Technology，Department of Electronics and Information Engineering Huazhong University of Science and Technology，Department of Electronics and Information Engineering Huazhong University of Science and Technology，Wuhan 430074 China，Wuhan 430074 China，Wuhan 430074 China |
| |
| 基金项目： | Supported by the National High-Tech Research and Development (863) Program of China (No. 2003AA12331005) and the National Natural Science Foundation of China (No. 60496315) |
| |
| 摘 要： | Introduction Spatial multiplexing is a simple technique that allows multiple-input multiple-output (MIMO) wireless sys- tems to attain high spectral efficiencies. Unfortunately, the lack of spatial redundancy makes spatial multiplex- ing susceptible to ra…
|
| 关 键 词： | 多用户 多输入多输出 预编码 空间多路复用 CSI |
| 收稿时间： | 2005-05-09 |
| 修稿时间： | 2005-05-092005-11-21 |
Precoding for Multiuser Spatial Multiplexing MIMO Downlink |
| |
| Bijun Zhang,
, Guangxi Zhu, &#x;&#x; ,Yingzhuang Liu, &#x; .Precoding for Multiuser Spatial Multiplexing MIMO Downlink[J].Tsinghua Science and Technology,2006,11(5):597-605. |
| |
| Authors: | Bijun Zhang
Guangxi Zhu &#x;&#x; Yingzhuang Liu &#x; |
| |
| Institution: | Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
| |
| Abstract: | Previous precoding algorithms have concentrated on the single user scenario where the precoding scheme assumes perfect channel state information (CSI) at the transmitter or on limited feedback tech- niques, such as channel quantization or limited feedback signal designs. This paper proposes a novel uni- tary downlink precoding design scheme for multiuser spatial multiplexing multiple-input multiple-output (MIMO) systems. With the perfect CSI available at the transmitter and the linear decoder at the receiver, the cost function was constructed based on the minimum average probability of vector symbol error and the de- sign method of the precoding matrices was given. These proposed precoding matrices can completely eliminate co-channel interference for each user at the transmitter, and each user will eventually observe an interference-free single user channel, thus simplify the decoding of each user. The impact of channel feed- back errors on the system performance and the upper bounds of several schemes for performance com- parison were investigated. The simulation results show that the proposed precoding for multiuser spatial multiplexing system obtains almost the same performance as the single user precoding system. |
| |
| Keywords: | multiuser multiple-input multiple-output( MIMO) precoding spatial multiplexing |
| 本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录！ |
