Cell partitioned M-QAM for semi-blind uplink interference suppression on multicell massive MIMO systems

被引：1
|
作者：
Matsubara, Kakeru [1 ]
Goto, Yuta [1 ]
Ito, Koki [1 ]
Shimada, Kazushi [1 ]
Maruta, Kazuki [2 ]
Ahn, Chang-Jun [1 ]
机构：
[1] Chiba Univ, Grad Sch Sci & Engn, Inage Ku, 1-33 Yayoi Cho, Chiba 2638522, Japan
[2] Tokyo Inst Technol, Acad Super Smart Soc, Tokyo 1528552, Japan
来源：
IEICE COMMUNICATIONS EXPRESS | 2021年 / 10卷 / 08期
关键词：
channel estimation; pilot contamination; massive MIMO; multicell; decision feedback; sample matrix inversion;
D O I：
10.1587/comex.2021ETL0015
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：
This letter adopts higher-order modulation scheme than 16QAM to our previously proposed semi-blind uplink interference suppression scheme for multicell multiuser massive MIMO systems. Our semi-blind approach is attained by the decision feedback channel estimation (DFCE) and the sample matrix inversion (SMI) spatial adaptive filtering. However, its efficiency depended on inter-cell interference (ICI), in particular for higher-order QAM. We propose to employ cell partitioning-based M-ary QAM to avoid ICI at the initial condition and verify overall spectral efficiency improvement.
引用
收藏
页码：428 / 434
页数：7
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