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Paper Abstract and Keywords
Presentation 2024-06-20 10:00
A Study on Precoder Design in Time-Varying mmWave MIMO Detection Based on Expectation Propagation
Tomoharu Furudoi, Takumi Takahashi (Osaka Univ.), Shinsuke Ibi (Doshisha Univ.), Hideki Ochiai (Osaka Univ.) RCS2024-55
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a novel precoder design for time-varying millimeter-wave (mmWave) multi-input multi-output (MIMO) detection via expectation propagation (EP). In mmWave wireless channels, even millisecond-scale fluctuations in the surrounding environment can significantly vary the channel state, which leads to the mismatch between the beam and the actual channel, deteriorating the communication quality. Assuming the use of the EP-based iterative detector to suppress interference components caused by this channel aging phenomenon, we aim to design a precoder that can maximize its detection performance by taking advantage of the characteristics of the iterative detector. In this paper, precoders imposing a certain non-uniformity among the MIMO spatial multiplexing streams are numerically shown to minimize the bit-error-rate (BER). We first hypothetically attribute the cause of this observation to the improvement in detection accuracy in the early iterations achieved by the non-uniformity, and then quantitatively evaluate it to discuss the appropriate criteria for the precoder design. Finally, the validity and efficacy of the proposed scheme were confirmed through numerical simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) Milimeter-wave MIMO / channel aging / expectation propagation / precoder design / iterative signal detection / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 84, RCS2024-55, pp. 162-167, June 2024.
Paper # RCS2024-55 
Date of Issue 2024-06-12 (RCS) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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 RCS2024-55

Conference Information
Committee RCS  
Conference Date 2024-06-19 - 2024-06-21 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2024-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Precoder Design in Time-Varying mmWave MIMO Detection Based on Expectation Propagation 
Sub Title (in English)  
Keyword(1) Milimeter-wave MIMO  
Keyword(2) channel aging  
Keyword(3) expectation propagation  
Keyword(4) precoder design  
Keyword(5) iterative signal detection  
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1st Author's Name Tomoharu Furudoi  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Takumi Takahashi  
2nd Author's Affiliation Osaka University (Osaka Univ.)
3rd Author's Name Shinsuke Ibi  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
4th Author's Name Hideki Ochiai  
4th Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2024-06-20 10:00:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2024-55 
Volume (vol) vol.124 
Number (no) no.84 
Page pp.162-167 
#Pages 6 
Date of Issue 2024-06-12 (RCS) 

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