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Paper Abstract and Keywords
Presentation 2024-01-19 10:20
Experimental Results of a Channel Sounder for Underwater Acoustic Communications in Sharrow Sea Environment
Kouichi Hashimoto, Taichi Fujita, Takumi Yoshimura, Hiroshi Kubo (Ritsumeikan Univ.) IT2023-58 SIP2023-91 RCS2023-233
Abstract (in Japanese) (See Japanese page) 
(in English) Doubly-selectivity of underwater acoustic communications (UWACs) can be measured by channel sounders, which estimate time-varying channel impulse response (CIR).
The authors have been making researches on channel sounders, which transmit the modified maximum length (M) sequence cyclically and estimate CIR by cyclic correlation.
However, these channel sounders suffer from a decrease of detected correlation values due to fast time-varying CIR.
This paper proposes a channel sounder employing re-samplers which compress and expand sampling periods, in order to solve this issue.
This channel sounder operates as follows:
1) prepare multiple re-samplers with different re-sampling rate;
2) calculate cyclic correlations respective for multiple re-samplers;
3) select cyclic correlation with the largest peak for the estimated CIR.
Next, computer simulation results confirm that this channel sounder has excellent CIR estimation performance in severe doubly-selective channel environments of UWACs.
Finally, experimental results in sharrow sea environment confirm that this channel sounder has excellent CIR estimation performance in fast moving speed environments of UWACs.
Keyword (in Japanese) (See Japanese page) 
(in English) Underwater Acoustic Communications / Doubly-Selective Channels / Channel Sounder / Re-Sampling / Cyclic Correlation / Channel Impulse Response / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 340, RCS2023-233, pp. 151-156, Jan. 2024.
Paper # RCS2023-233 
Date of Issue 2024-01-11 (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 IT2023-58 SIP2023-91 RCS2023-233

Conference Information
Committee SIP IT RCS  
Conference Date 2024-01-18 - 2024-01-19 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To RCS 
Conference Code 2024-01-SIP-IT-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental Results of a Channel Sounder for Underwater Acoustic Communications in Sharrow Sea Environment 
Sub Title (in English)  
Keyword(1) Underwater Acoustic Communications  
Keyword(2) Doubly-Selective Channels  
Keyword(3) Channel Sounder  
Keyword(4) Re-Sampling  
Keyword(5) Cyclic Correlation  
Keyword(6) Channel Impulse Response  
Keyword(7)  
Keyword(8)  
1st Author's Name Kouichi Hashimoto  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Taichi Fujita  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
3rd Author's Name Takumi Yoshimura  
3rd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
4th Author's Name Hiroshi Kubo  
4th Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Speaker Author-1 
Date Time 2024-01-19 10:20:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # IT2023-58, SIP2023-91, RCS2023-233 
Volume (vol) vol.123 
Number (no) no.338(IT), no.339(SIP), no.340(RCS) 
Page pp.151-156 
#Pages 6 
Date of Issue 2024-01-11 (IT, SIP, RCS) 

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