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Paper Abstract and Keywords
Presentation 2026-03-06 09:55
Software-Defined Radio Platform for Ultra-Wideband THz 5G NR Signal Transmission in Highly Mobile Environments
Muko Okamatsu, Shota Mori, Yusuke Koda, Norichika Ohmi, Hiroshi Harada (Kyoto Univ.) RCS2025-288
Abstract (in Japanese) (See Japanese page) 
(in English) Toward further enhancement of data rate and capacity in sixth-generation (6G) mobile communication systems, the utilization of the terahertz (THz) band has attracted significant attention. In 6G, it is actively discussed that physical-layer transmission signal formats may be designed by inheriting those of the current fifth-generation (5G) New Radio (NR) system. To investigate utilization scenarios and physical-layer transmission schemes of the THz band in 6G, a wireless transmission test platform capable of transmitting and receiving 5G NR signals, while allowing flexible customization of physical-layer parameters, is indispensable. In this paper, we develop a THz-band ultra-wideband software-defined radio (SDR) platform that enables transmission of 5G NR signals with an extended bandwidth of 8 GHz in the 300 GHz band and evaluate its transmission characteristics in highly mobile environments. In particular, 6G is expected to support mobility up to 1000 km/h, including satellite-to-ground communication scenarios, where robustness against carrier frequency offset (CFO) becomes a critical requirement. We first investigate the impact of CFO occurring in the 300 GHz band on 5G NR synchronization signals, and then propose a pre-synchronization CFO estimation scheme that improves synchronization performance under such severe conditions. Furthermore, the proposed scheme is implemented on the developed platform, and it is demonstrated that a carrier data rate of 14.6 Gbit/s can be achieved while satisfying a block error rate of 0.1 or less, even under CFO conditions corresponding to a maximum Doppler frequency owing to a mobility up to 1000 km/h.
Keyword (in Japanese) (See Japanese page) 
(in English) Terahertz / 5G NR / Ultra-wideband / SDR / Highly mobile environment / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 387, RCS2025-288, pp. 170-175, March 2026.
Paper # RCS2025-288 
Date of Issue 2026-02-25 (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 RCS2025-288

Conference Information
Committee RCS SR SRW  
Conference Date 2026-03-04 - 2026-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo University of Science 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2026-03-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Software-Defined Radio Platform for Ultra-Wideband THz 5G NR Signal Transmission in Highly Mobile Environments 
Sub Title (in English)  
Keyword(1) Terahertz  
Keyword(2) 5G NR  
Keyword(3) Ultra-wideband  
Keyword(4) SDR  
Keyword(5) Highly mobile environment  
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1st Author's Name Muko Okamatsu  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Shota Mori  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Yusuke Koda  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Norichika Ohmi  
4th Author's Affiliation Kyoto University (Kyoto Univ.)
5th Author's Name Hiroshi Harada  
5th Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2026-03-06 09:55:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2025-288 
Volume (vol) vol.125 
Number (no) no.387 
Page pp.170-175 
#Pages 6 
Date of Issue 2026-02-25 (RCS) 

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