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 2026-01-26 10:20
CAZAC-based Chirp Division Multiplexing
Ryoya Saito (UEC), Koichi Adachi (Keio Univ.) IT2025-41 SIP2025-55 RCS2025-212
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a multi-carrier transmission scheme called Constant Amplitude Zero Auto-Correlation (CAZAC) Chirp Division Multiplexing (CCDM), which is robust against doubly selective channels. While Affine Frequency Division Multiplexing (AFDM) is a promising waveform for high-mobility communications, it requires complex parameter tuning and a specialized guard interval. The proposed CCDM exploits the orthogonality of cyclically shifted Zadoff-Chu (ZC) sequences for multiplexing. It features a single tunable parameter, the textit{root index}, which allows for flexible adjustment of Doppler resilience, and utilizes a standard Cyclic Prefix (CP) compatible with Orthogonal Frequency Division Multiplexing (OFDM). Furthermore, the proposed CCDM can be implemented with a fast modulation/demodulation algorithm based on matrix decomposition. Simulation results demonstrate that CCDM outperforms Orthogonal Chirp Division Multiplexing (OCDM) in high Doppler environments and achieves full diversity gain comparable to AFDM with appropriate selection of the root index.
Keyword (in Japanese) (See Japanese page) 
(in English) AFDM / OCDM / Double-Selective Channel / Chirp / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 334, RCS2025-212, pp. 31-36, Jan. 2026.
Paper # RCS2025-212 
Date of Issue 2026-01-19 (IT, SIP, 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 IT2025-41 SIP2025-55 RCS2025-212

Conference Information
Committee IT RCS SIP  
Conference Date 2026-01-26 - 2026-01-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Forest Sendai 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal Processing for Wireless Communications, Learning, Mathematics, Information Theory, etc. 
Paper Information
Registration To RCS 
Conference Code 2026-01-IT-RCS-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) CAZAC-based Chirp Division Multiplexing 
Sub Title (in English)  
Keyword(1) AFDM  
Keyword(2) OCDM  
Keyword(3) Double-Selective Channel  
Keyword(4) Chirp  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Ryoya Saito  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Koichi Adachi  
2nd Author's Affiliation Keio University (Keio Univ.)
3rd Author's Name  
3rd Author's Affiliation ()
4th Author's Name  
4th Author's Affiliation ()
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 2026-01-26 10:20:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # IT2025-41, SIP2025-55, RCS2025-212 
Volume (vol) vol.125 
Number (no) no.332(IT), no.333(SIP), no.334(RCS) 
Page pp.31-36 
#Pages 6 
Date of Issue 2026-01-19 (IT, SIP, RCS) 

[Return to Top Page]

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