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Paper Abstract and Keywords
Presentation 2026-01-26 09:30
Study on a High-Accuracy Demodulation Scheme for DFT-s-OFDM Using CAF
Shota Mogami, Tomoharu Furudoi, Takumi Takahashi, Hideki Ochiai (UOsaka) IT2025-39 SIP2025-53 RCS2025-210
Abstract (in Japanese) (See Japanese page) 
(in English) Orthogonal frequency-division multiplexing (OFDM), which has been widely adopted in current wireless communication systems, suffers from transmission inefficiency due to a high peak-to-average power ratio (PAPR).
To address this issue, the uplink typically employs discrete Fourier transform-spread OFDM (DFT-s-OFDM), which achieves a relatively low PAPR.
In this paper, we further investigate PAPR reduction by applying the clipping and filtering (CAF) technique.
Although CAF can significantly reduce the PAPR, it introduces nonlinear distortion that must be compensated for at the receiver.
To this end, we design an iterative demodulation scheme based on vector approximate message passing (VAMP), using a linear model obtained from the Bussgang decomposition of the received signal.
Computer simulation results for DFT-s-OFDM systems demonstrate that the proposed method achieves high-accuracy demodulation while maintaining low computational complexity.
Keyword (in Japanese) (See Japanese page) 
(in English) Peak-to-average power ratio / clipping and filtering / Bussgang decomposition / vector AMP / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 334, RCS2025-210, pp. 19-24, Jan. 2026.
Paper # RCS2025-210 
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 IT2025-39 SIP2025-53 RCS2025-210

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) Study on a High-Accuracy Demodulation Scheme for DFT-s-OFDM Using CAF 
Sub Title (in English)  
Keyword(1) Peak-to-average power ratio  
Keyword(2) clipping and filtering  
Keyword(3) Bussgang decomposition  
Keyword(4) vector AMP  
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1st Author's Name Shota Mogami  
1st Author's Affiliation Osaka University (UOsaka)
2nd Author's Name Tomoharu Furudoi  
2nd Author's Affiliation Osaka University (UOsaka)
3rd Author's Name Takumi Takahashi  
3rd Author's Affiliation Osaka University (UOsaka)
4th Author's Name Hideki Ochiai  
4th Author's Affiliation Osaka University (UOsaka)
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Speaker Author-1 
Date Time 2026-01-26 09:30:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # IT2025-39, SIP2025-53, RCS2025-210 
Volume (vol) vol.125 
Number (no) no.332(IT), no.333(SIP), no.334(RCS) 
Page pp.19-24 
#Pages 6 
Date of Issue 2026-01-19 (IT, SIP, RCS) 

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