Prediction-aided precoding for multiuser massive MIMO null-space expansion

被引：2

作者：

Arai, Kabuto ^{[1
]}

Maruta, Kazuki ^{[2
]}

Ahn, Chang-Jun ^{[1
]}

机构：

[1] Chiba Univ, Grad Sch Engn, Inage Ku, 1-33 Yayoicho, Chiba, Chiba 2638522, Japan

[2] Tokyo Inst Technol, Acad Super Smart Soc, Tokyo 1528552, Japan

来源：

IEICE COMMUNICATIONS EXPRESS | 2021年 / 10卷 / 05期

关键词：

null-space expansion; multiuser MIMO; massive MIMO; time-varying channels; channel prediction;

D O I：

10.1587/comex.2021XBL0012

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 proposes a new precoding design scheme to improve the null-space expansion (NSE) for multi-user massive MIMO systems. In NSE, steering many nulls based on past channel state information (CSI) significantly improves inter-user interference (IUI) suppression capability in a time-varying channel environment. However, extensive nullification consumes a part of the degree of freedom (DoF) resulting in the degradation of the desired signal gain. Our new proposal predicts the desired user's channel state and derives the precoding weight to compensate for that loss. Computer simulation verifies the improved signal-to-interference-plus-noise power ratio (SINR) performance.

引用

页码：212 / 218

页数：7

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