MIMO broadcast transmission strategy over fast time-varying channels

被引：0
|
作者：
Wang, Hongmei [1 ]
Xu, Xibin [1 ]
Zhao, Ming [1 ]
Wu, Weiling [2 ]
Yao, Yan [1 ]
机构：
[1] Tsinghua Univ, Natl Lab Informat Sci & Technol, Beijing 100084, Peoples R China
[2] Beijing Univ Posts & Telecommun, Sch Informat Engn, Beijing 100084, Peoples R China
来源：
IEICE TRANSACTIONS ON COMMUNICATIONS | 2008年 / E91B卷 / 08期
关键词：
multiuser MIMO downlink systems; time-varying wireless channel; outdated channel state information (CSI); minimum mean squared error (MMSE);
D O I：
10.1093/ietcom/e91-b.8.2731
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In time-varying channels, the channel state information available at the transmitter (CSIT) is outdated due to inherent time delay between the uplink channel estimation and the downlink data transmission in TDD systems. In this letter, we propose an iterative precoding method and a linear decoding method which are both based on minimum mean-squared error (MMSE) criteria to mitigate the interference among data streams and users created by outdated CSIT for multiuser MIMO downlink systems. Analysis and simulation results show that the proposed method can effectively reduce the impairment of the outdated CSIT and improve the system capacity.
引用
收藏
页码：2731 / 2735
页数：5
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