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Paper Abstract and Keywords
Presentation 2026-06-17 17:50
Performance Evaluation of Sub-THz-Band MIMO Channel Prediction Using OMP and Least Squares
Emana Ushida, Toshihiko Nishimura, Yasutaka Ogawa, Katsuya Suto (Hokkaido Univ.), Satoshi Suyama (NTT DOCOMO) RCS2026-47
Abstract (in Japanese) (See Japanese page) 
(in English) In sixth-generation mobile communication systems (6G), MIMO spatial multiplexing in sub-THz band is expected to achieve extremely high data rates. However, due to the high carrier frequencies of the sub-THz band, channel variations caused by the mobility of terminals and/or surrounding scatterers become more pronounced. To address this, channel prediction is proposed to reduce the transmission frequency of pilot symbols required for data demodulation. Previous studies have proposed methods to estimate delays and complex amplitudes of multipath components by applying compressed sensing algorithms and the least squares method to predict future channels. In this paper, we investigate a scheme using OMP and least squares, which offers a lower computational load. We evaluate the effective prediction horizon of the proposed method by comparing it with the channel estimates obtained from pilot symbols to determine how far into the future the predicted values can maintain acceptable accuracy. The simulation results demonstrate that when user equipment moves at a velocity of 1 m/s, the proposed method can maintain higher prediction accuracy for up to approximately 5 ms depending on the multipath environment.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO / channel prediction / SOS method / sub-Terahertz band / OMP / least-squares method / pilot symbols /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 72, RCS2026-47, pp. 123-128, June 2026.
Paper # RCS2026-47 
Date of Issue 2026-06-10 (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 RCS2026-47

Conference Information
Committee RCS  
Conference Date 2026-06-17 - 2026-06-19 
Place (in Japanese) (See Japanese page) 
Place (in English) The Ohama Nobumoto Memorial Hall 
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 2026-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance Evaluation of Sub-THz-Band MIMO Channel Prediction Using OMP and Least Squares 
Sub Title (in English)  
Keyword(1) MIMO  
Keyword(2) channel prediction  
Keyword(3) SOS method  
Keyword(4) sub-Terahertz band  
Keyword(5) OMP  
Keyword(6) least-squares method  
Keyword(7) pilot symbols  
Keyword(8)  
1st Author's Name Emana Ushida  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Toshihiko Nishimura  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
3rd Author's Name Yasutaka Ogawa  
3rd Author's Affiliation Hokkaido University (Hokkaido Univ.)
4th Author's Name Katsuya Suto  
4th Author's Affiliation Hokkaido University (Hokkaido Univ.)
5th Author's Name Satoshi Suyama  
5th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
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Speaker Author-1 
Date Time 2026-06-17 17:50:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2026-47 
Volume (vol) vol.126 
Number (no) no.72 
Page pp.123-128 
#Pages 6 
Date of Issue 2026-06-10 (RCS) 

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