Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2026-07-10 10:00
Study on Transmission Signal Design for Terahertz Wireless Communication Systems Using Quantum Cascade Lasers
Haruma Minami, Kenta Umebayashi, Ya Zhang (TUAT), Hua Li (CAS) EMT2026-39 MW2026-62 OPE2026-45 EST2026-43 MWPTHz2026-54
Abstract (in Japanese) (See Japanese page) 
(in English) In this study, we consider a wireless communication system using a quantum cascade laser (QCL), which is expected to be applied to terahertz-band wireless communications, and optimize the input current of the QCL to improve the channel capacity.
In 6G systems, ultrahigh-speed wireless communications on the order of 1 Tbit/s using the terahertz band are expected to be realized.
Specifically, under a constant power consumption constraint, the bias current, modulation current, and symbol period are designed via exhaustive search based on computer simulations.
In QCL-based wireless communications, system performance is degraded by noise and inter-symbol interference (ISI).
Therefore, by taking these effects into account and optimizing the input current, which corresponds to the transmitted signal, the channel capacity can be improved.
This study demonstrates that appropriate design of the input current parameters—bias current, modulation current, and symbol period—leads to an improvement in channel capacity.
In addition, we also show how the channel capacity varies with power consumption and available bandwidth.
Keyword (in Japanese) (See Japanese page) 
(in English) quantum cascade lasers / terahertz wireless communications / transmit signal design / channel capacity / input-output characteristics / impulse response / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 100, MWPTHz2026-54, pp. 190-193, July 2026.
Paper # MWPTHz2026-54 
Date of Issue 2026-07-02 (EMT, MW, OPE, EST, MWPTHz) 
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 EMT2026-39 MW2026-62 OPE2026-45 EST2026-43 MWPTHz2026-54

Conference Information
Committee OPE EST MWPTHz MW EMT IEE-EMT  
Conference Date 2026-07-09 - 2026-07-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Kushiro Chamber of Commerce and Industry 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Workshop on Optical and Microwave technologies 
Paper Information
Registration To MWPTHz 
Conference Code 2026-07-OPE-EST-MWPTHz-MW-EMT-EMT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on Transmission Signal Design for Terahertz Wireless Communication Systems Using Quantum Cascade Lasers 
Sub Title (in English)  
Keyword(1) quantum cascade lasers  
Keyword(2) terahertz wireless communications  
Keyword(3) transmit signal design  
Keyword(4) channel capacity  
Keyword(5) input-output characteristics  
Keyword(6) impulse response  
Keyword(7)  
Keyword(8)  
1st Author's Name Haruma Minami  
1st Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
2nd Author's Name Kenta Umebayashi  
2nd Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
3rd Author's Name Ya Zhang  
3rd Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
4th Author's Name Hua Li  
4th Author's Affiliation Chinese Academy of Sciences (CAS)
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2026-07-10 10:00:00 
Presentation Time 25 minutes 
Registration for MWPTHz 
Paper # EMT2026-39, MW2026-62, OPE2026-45, EST2026-43, MWPTHz2026-54 
Volume (vol) vol.126 
Number (no) no.96(EMT), no.97(MW), no.98(OPE), no.99(EST), no.100(MWPTHz) 
Page pp.190-193 
#Pages 4 
Date of Issue 2026-07-02 (EMT, MW, OPE, EST, MWPTHz) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan