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Paper Abstract and Keywords
Presentation 2025-11-14 15:25
Candidate waveform for 6G Satellite Communications: Affine Frequency Division Multiplexing (AFDM)
Hee Wook Kim, Ryu Joon Gyu (ETRI), Qu Luo (UoS) SANE2025-77
Abstract (in Japanese) (See Japanese page) 
(in English) This paper investigates Affine Frequency Division Multiplexing (AFDM) as a potential additional waveform candidate for 6G radio, based on the 3GPP RAN1 Study Item on 6G Radio (6GR). AFDM utilizes the Discrete Affine Fourier Transform (DAFT) to diagonalize doubly dispersive channels in the delay–Doppler domain, providing inherent robustness under high mobility and non-terrestrial network (NTN) conditions. Simulation analyses indicate that AFDM offers up to 1.5 dB block error rate (BLER) gain under strong Doppler spreads compared to conventional CP-OFDM. The waveform’s chirp-based structure also enables native compatibility with integrated sensing and communication (ISAC), allowing radar-like sensing without additional resource overhead. Furthermore, AFDM can be integrated into the 3GPP NR architecture through minor modifications to existing FFT/IFFT-based hardware. These results demonstrate that AFDM represents an OFDM-extensible waveform candidate suitable for addressing key 6G requirements including robustness, efficiency, and ISAC integration.
Keyword (in Japanese) (See Japanese page) 
(in English) AFDM / CP-OFDM / DAFT / NR / NTN / ISAC / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 245, SANE2025-77, pp. 119-123, Nov. 2025.
Paper # SANE2025-77 
Date of Issue 2025-11-06 (SANE) 
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)
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Conference Information
Committee SANE  
Conference Date 2025-11-13 - 2025-11-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Ajou University, Republic of Korea 
Topics (in Japanese) (See Japanese page) 
Topics (in English) ICSANE 
Paper Information
Registration To SANE 
Conference Code 2025-11-SANE 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Candidate waveform for 6G Satellite Communications: Affine Frequency Division Multiplexing (AFDM) 
Sub Title (in English)  
Keyword(1) AFDM  
Keyword(2) CP-OFDM  
Keyword(3) DAFT  
Keyword(4) NR  
Keyword(5) NTN  
Keyword(6) ISAC  
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Keyword(8)  
1st Author's Name Hee Wook Kim  
1st Author's Affiliation Electronics and Telecommunications Research Institute (ETRI)
2nd Author's Name Ryu Joon Gyu  
2nd Author's Affiliation Electronics and Telecommunications Research Institute (ETRI)
3rd Author's Name Qu Luo  
3rd Author's Affiliation University of Surrey (UoS)
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Speaker Author-1 
Date Time 2025-11-14 15:25:00 
Presentation Time 15 minutes 
Registration for SANE 
Paper # SANE2025-77 
Volume (vol) vol.125 
Number (no) no.245 
Page pp.119-123 
#Pages 5 
Date of Issue 2025-11-06 (SANE) 

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