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Paper Abstract and Keywords
Presentation 2026-07-24 09:30
Evaluation of Dual-Beam MIMO Using Reflection Paths for 300 GHz Indoor Mobile Access
Minseok Kim, Takanori Mashima, Yuxuan Ding (Niigata Univ.) AP2026-62
Abstract (in Japanese) (See Japanese page) 
(in English) The sub-THz band, particularly the 300~GHz band, is a promising candidate for 100~Gbps-class short-range wireless access by exploiting its wide available bandwidth. However, large propagation loss and high blockage sensitivity make it challenging to ensure link robustness and channel capacity. This paper presents a site-specific evaluation of dual-beam MIMO transmission for 300~GHz mobile access using multipath components (MPCs) and RIS-enhanced reflection paths. Based on ray-tracing with measurement-based MPC power correction, we compare the capacities of LoS single-beam transmission, dual-beam MIMO using the LoS path and the strongest MPC, and dual-beam MIMO using the LoS path and an RIS-assisted reflection path. The results show that the capacity improvement obtained using only environmental MPCs is limited, whereas strengthening weak reflection paths on a link-by-link basis using an RIS can improve the spectral efficiency.
Keyword (in Japanese) (See Japanese page) 
(in English) 300 GHz / sub-THz / dual-beam MIMO / RIS / ray tracing / channel capacity / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 122, AP2026-62, pp. 112-117, July 2026.
Paper # AP2026-62 
Date of Issue 2026-07-15 (AP) 
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 AP2026-62

Conference Information
Committee SAT AP SANE  
Conference Date 2026-07-22 - 2026-07-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Kobe Port Oasis 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Remote sensing, Sattelite Communication, Radio propagation, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2026-07-SAT-AP-SANE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of Dual-Beam MIMO Using Reflection Paths for 300 GHz Indoor Mobile Access 
Sub Title (in English)  
Keyword(1) 300 GHz  
Keyword(2) sub-THz  
Keyword(3) dual-beam MIMO  
Keyword(4) RIS  
Keyword(5) ray tracing  
Keyword(6) channel capacity  
Keyword(7)  
Keyword(8)  
1st Author's Name Minseok Kim  
1st Author's Affiliation Niigata University (Niigata Univ.)
2nd Author's Name Takanori Mashima  
2nd Author's Affiliation Niigata University (Niigata Univ.)
3rd Author's Name Yuxuan Ding  
3rd Author's Affiliation Niigata University (Niigata Univ.)
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Speaker Author-1 
Date Time 2026-07-24 09:30:00 
Presentation Time 20 minutes 
Registration for AP 
Paper # AP2026-62 
Volume (vol) vol.126 
Number (no) no.122 
Page pp.112-117 
#Pages 6 
Date of Issue 2026-07-15 (AP) 

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