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Paper Abstract and Keywords
Presentation 2019-07-10 15:20
A Study on Concatenated Beam- and Antenna- domain Layered BP for Large MIMO Detection
Takumi Takahashi (Osaka Univ.), Antti Tolli (Univ. of Oulu), Shinsuke Ibi (Doshisha Univ.), Seiichi Sampei (Osaka Univ.) RCC2019-15 NS2019-48 RCS2019-105 SR2019-24 SeMI2019-24
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a concatenated beam- and antenna-domain belief propagation (BP) for realizing low-complexity large multi-user MIMO detection. As a low-complexity strategy for large-scale multi-user detection (MUD), group-specific signal detection in the beam domain has been proposed, where user equipments (UEs) are grouped based on the long-term channel statistics at a base station (BS) to design outer beamformer (OBF). In this case, the BP-based algorithm is effective as the subsequent signal detector to compensate for the performance degradation due to the dimensionality reduction caused by the OBF. However, the convergence characteristics of beam-domain BP is degraded as compared to the antenna-domain BP due to an increased correlation between the beliefs. To avoid the impairments, we propose a novel concatenated structure of beam- and antenna-domain BP layers, which allows us to benefit from the advantages of both domains while maintaining low signal processing complexity. Numerical results show the validity of our proposed method in terms of the bit error rate (BER) performance both in the coded and uncoded cases and the computational complexity.
Keyword (in Japanese) (See Japanese page) 
(in English) Large MIMO / Belief propagation / Beam-domain processing / Low complexity / Domain conversion / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 108, RCS2019-105, pp. 25-30, July 2019.
Paper # RCS2019-105 
Date of Issue 2019-07-03 (RCC, NS, RCS, SR, SeMI) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF RCC2019-15 NS2019-48 RCS2019-105 SR2019-24 SeMI2019-24

Conference Information
Committee SeMI RCS NS SR RCC  
Conference Date 2019-07-10 - 2019-07-12 
Place (in Japanese) (See Japanese page) 
Place (in English) I-Site Nanba(Osaka) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Communication and Networked Control for the Future Radio of the AI Age, etc 
Paper Information
Registration To RCS 
Conference Code 2019-07-SeMI-RCS-NS-SR-RCC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Concatenated Beam- and Antenna- domain Layered BP for Large MIMO Detection 
Sub Title (in English)  
Keyword(1) Large MIMO  
Keyword(2) Belief propagation  
Keyword(3) Beam-domain processing  
Keyword(4) Low complexity  
Keyword(5) Domain conversion  
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1st Author's Name Takumi Takahashi  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Antti Tolli  
2nd Author's Affiliation University of Oulu (Univ. of Oulu)
3rd Author's Name Shinsuke Ibi  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
4th Author's Name Seiichi Sampei  
4th Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2019-07-10 15:20:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCC2019-15, NS2019-48, RCS2019-105, SR2019-24, SeMI2019-24 
Volume (vol) vol.119 
Number (no) no.106(RCC), no.107(NS), no.108(RCS), no.109(SR), no.110(SeMI) 
Page pp.21-26(RCC), pp.31-36(NS), pp.25-30(RCS), pp.31-36(SR), pp.35-40(SeMI) 
#Pages
Date of Issue 2019-07-03 (RCC, NS, RCS, SR, SeMI) 


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