Presentation 2021-08-24
[Short Paper] Opportunistic Scheduling for Downlink MU-MIMO Systems
Youchen Lu, Satoshi Denno, Yafei Hou,
PDF Download Page PDF download Page Link
Abstract(in Japanese) (See Japanese page)
Abstract(in English) This paper investigates the user scheduling method for the downlink of the MU-MIMO system. As we all know, multiple-input and multiple-output (MIMO) technology has become one of the main technologies. The multi-user and multiple-input multiple-output (MU-MIMO) system has also attracted more and more attention. However, since MU-MIMO system share the same time and frequency resources, multi-user co-channel interference (CCI) is inevitably introduced, which affects the reliable reception of data and reduces the throughput of the MU-MIMO system. In order to effectively suppress the CCI of multiple users, the base station (abbreviated as BS) needs to use a reasonable user scheduling method. In order to make the base station (BS) learn the user's channel information through channel reciprocity and more suitable for systems with precoding technology, we choose downlink MU-MIMO system in Time Division Duplex (TDD) mode. In addition, we also added minimum mean squared error (MMSE) precoding to the system, which can effectively suppress the communication interference between multiple users. User scheduling increases the channel capacity by selecting a set of best users, thereby increasing the multi-user multiple input multiple output (MU-MIMO) gain. However, it is difficult to know which of the many existing user scheduling methods can give full play to the advantages in downlink MU-MIMO system. In this paper, we compare four different user scheduling methods in a downlink $N_mathrm{T} times N_mathrm{R}$ MU-MIMO system, and according to the simulation results of each method, we propose a more suitable and efficient user scheduling method in different conditions.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) MU-MIMO / User Scheduling / Precoding Technology
Paper # SRW2021-16
Date of Issue 2021-08-17 (SRW)

Conference Information
Committee SRW
Conference Date 2021/8/24(1days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English) WLAN, WPAN, Ad-hoc, mmWave, etc.
Chair Hanako Noda(Anritsu)
Vice Chair Keiichi Mizutani(Kyoto Univ.) / Kentaro Saito(Tokyo Denki Univ.) / Hirokazu Sawada(NICT)
Secretary Keiichi Mizutani(NTT) / Kentaro Saito(NIigata Univ.) / Hirokazu Sawada
Assistant Akihito Noda(Nanzan Univ.)

Paper Information
Registration To Technical Committee on Short Range Wireless Communications
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) [Short Paper] Opportunistic Scheduling for Downlink MU-MIMO Systems
Sub Title (in English)
Keyword(1) MU-MIMO
Keyword(2) User Scheduling
Keyword(3) Precoding Technology
1st Author's Name Youchen Lu
1st Author's Affiliation Okayama University(Okayama University)
2nd Author's Name Satoshi Denno
2nd Author's Affiliation Okayama University(Okayama University)
3rd Author's Name Yafei Hou
3rd Author's Affiliation Okayama University(Okayama University)
Date 2021-08-24
Paper # SRW2021-16
Volume (vol) vol.121
Number (no) SRW-145
Page pp.pp.13-13(SRW),
#Pages 1
Date of Issue 2021-08-17 (SRW)