Enhanced Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems for Multi Modulus Signals

被引:2
作者
Maruta, Kazuki [1 ]
Ahn, Chang-Jun [1 ]
机构
[1] Chiba Univ, Grad Sch Engn, Chiba, Japan
来源
2019 IEEE 90TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2019-FALL) | 2019年
关键词
Massive MIMO; Multicell; Pilot contamination; Multi modulus algorithm; Channel estimation; Decision feedback; Beamspace; CHANNEL ESTIMATION; CAPACITY;
D O I
10.1109/vtcfall.2019.8891412
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This paper expands our previously proposed semi-blind uplink interference suppression scheme on multicell multiuser massive MIMO systems to support multi modulus signals. The original proposal applies channel state information (CSI) aided blind adaptive array (BAA) interference suppression after the beamspace preprocessing and decision feedback channel estimation (DFCE). It employed the constant modulus algorithm (CMA) as the BAA scheme which can fully exploit the degree of freedom (DoF) of massive antenna arrays to suppress both inter-user interference (IUI) and inter-cell interference (ICI). Its effectiveness has been verified under the extensive pilot contamination constraint. Unfortunately, CMA basically works well only for the constant envelope signal such as QPSK and thus the proposed scheme should be expanded to cover QAM signals for more general use. This paper newly proposes to apply multi modulus algorithm (MMA) and data-aided sample matrix inversion based minimum mean square error (MMSE-SMI) weight derivation. It can successfully realize interference suppression under the use of multi-level envelope signals such as 16QAM with satisfactorily outage probability performance.
引用
收藏
页数:6
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