Spectral Efficiency of Multi-Cell Multi-User DAS with Pilot Contamination

被引：0
|
作者：
Wang, Dongming [1 ,2 ]
Ji, Chen [1 ]
Sun, Shaohui [2 ]
You, Xiaohu [1 ]
机构：
[1] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing, Peoples R China
[2] State Key Lab Wireless Mobile Commun CATT, Beijing, Peoples R China
来源：
2013 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) | 2013年
基金：
中国国家自然科学基金;
关键词：
DISTRIBUTED ANTENNA SYSTEMS; MOBILE COMMUNICATIONS; CHANNEL-ESTIMATION; PART I; PERFORMANCE; CAPACITY; TRANSMISSION; WIRELESS;
D O I：
暂无
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：
The spectral efficiency of multi-cell multi-user distributed antenna system with imperfect channel state information (CSI) is studied in this paper. First, considering the pilot contamination and minimum mean-squared-error (MMSE) channel estimation, the equivalent channel model is presented and the sum-rate of the uplink transmission is derived. Under a physical channel model, the equivalent channel model can be seen as a special case of the joint correlated MIMO channel model proposed by Gao [1]. Then, the closed-form approximation of the spectral efficiency is derived. The spectral efficiency of the system with large number of antennas is also studied. Finally, the theoretical results are compared with Monte-Carlo simulation, and the performances of DAS and co-located massive MIMO are also compared. It is shown that similar to the systems with perfect CSIs, DAS still has large performance gains compared with massive MIMO.
引用
收藏
页码：3208 / 3212
页数：5
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