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Paper Abstract and Keywords
Presentation 2025-07-30 10:00
Comparison between Coherent OFDM and Differential OFDM for Double Selectivity of Underwater Acoustic Communications
Haruto Matsuki (Ritsumeikan Univ), Mitsuyasu Deguchi, Yukihiro Kida, Takuya Shimura (JAMSTEC), Kenshi Saho, Hiroshi Kubo (Ritsumeikan Univ) SR2025-16
Abstract (in Japanese) (See Japanese page) 
(in English) Underwater acoustic communications (UWACs) suffer from severe time and frequency selectivity, i.e., double selectivity. For frequency selectivity, orthogonal frequency division multiplexing (OFDM) with large cyclic prefix (CP) is a good solution. This paper reveals demodulation direction should be restricted to time axis for OFDM with large CP. This paper discusses interval of pilot symbols for coherent OFDM. Next, this paper discusses channel prediction of multiple differential detection. Finally, this paper makes a performance comparison between coherent OFDM and differential OFDM.
Keyword (in Japanese) (See Japanese page) 
(in English) Orthogonal Frequency Division Multiplexing / Coherent Detection / Differential Encoding / Multiple Differential Detection / Double Selectivity / Underwater Acoustic Communications / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 134, SR2025-16, pp. 1-6, July 2025.
Paper # SR2025-16 
Date of Issue 2025-07-23 (SR) 
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 SR2025-16

Conference Information
Committee SR RCS RCC SeMI NS RISING HCL  
Conference Date 2025-07-30 - 2025-08-01 
Place (in Japanese) (See Japanese page) 
Place (in English) MALIOS 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SR 
Conference Code 2025-07-SR-RCS-RCC-SeMI-NS-RISING-HCL 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Comparison between Coherent OFDM and Differential OFDM for Double Selectivity of Underwater Acoustic Communications 
Sub Title (in English)  
Keyword(1) Orthogonal Frequency Division Multiplexing  
Keyword(2) Coherent Detection  
Keyword(3) Differential Encoding  
Keyword(4) Multiple Differential Detection  
Keyword(5) Double Selectivity  
Keyword(6) Underwater Acoustic Communications  
Keyword(7)  
Keyword(8)  
1st Author's Name Haruto Matsuki  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ)
2nd Author's Name Mitsuyasu Deguchi  
2nd Author's Affiliation Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
3rd Author's Name Yukihiro Kida  
3rd Author's Affiliation Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
4th Author's Name Takuya Shimura  
4th Author's Affiliation Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
5th Author's Name Kenshi Saho  
5th Author's Affiliation Ritsumeikan University (Ritsumeikan Univ)
6th Author's Name Hiroshi Kubo  
6th Author's Affiliation Ritsumeikan University (Ritsumeikan Univ)
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Speaker Author-1 
Date Time 2025-07-30 10:00:00 
Presentation Time 25 minutes 
Registration for SR 
Paper # SR2025-16 
Volume (vol) vol.125 
Number (no) no.134 
Page pp.1-6 
#Pages 6 
Date of Issue 2025-07-23 (SR) 

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