Paper Abstract and Keywords |
Presentation |
2020-01-24 12:35
Differential Orthogonal Frequency-Division Multiplexing Employing AFC for Time-Varying Doppler Shifts in Underwater Acoustic Communications Yui Nakai, Yuka Tanaka, Hiroshi Kubo (Ritsumeikan Univ.) IT2019-70 SIP2019-83 RCS2019-300 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
This paper proposes differential orthogonal frequency division multiplexing (OFDM) employing automatic frequency control (AFC) for time-varying Doppler shifts in underwater acoustic communications (UWACs). There exist the following two issues in UWACs: 1) to improve time and frequency selective channels, i.e., doubly-selective channels; 2) to track fast time-varying Doppler shifts. With respect to the problem 1), the proposed scheme employs differential encoding and differential detection for time selectivity, and it also employs OFDM for frequency selectivity. With respect to the problem 2), the proposed scheme employs a multiple open-loop frequency estimation (MOLFE), which has good trade-off between frequency coverage and estimation accuracy in short observation time. Next, this paper proposes a simple time-varying Doppler shifts model of a turning AUV for simulation similar to real environment. Finally, computer simulation confirms that the proposed differential OFDM employing MOLFE has excellent performance in doubly-selective channels with time-varying Doppler shifts like turning AUV. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Underwater Acoustic Communications / Differential Orthogonal Frequency Division Multiplexing / Automatic Frequency Control / Tone Signal / Doubly-Selective Channels / Time-Varying Doppler Shifts / / |
Reference Info. |
IEICE Tech. Rep., vol. 119, no. 378, RCS2019-300, pp. 197-202, Jan. 2020. |
Paper # |
RCS2019-300 |
Date of Issue |
2020-01-16 (IT, SIP, RCS) |
ISSN |
Print edition: ISSN 0913-5685 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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IT2019-70 SIP2019-83 RCS2019-300 |
Conference Information |
Committee |
IT SIP RCS |
Conference Date |
2020-01-23 - 2020-01-24 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Hiroshima City Youth Center |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
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Paper Information |
Registration To |
RCS |
Conference Code |
2020-01-IT-SIP-RCS |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Differential Orthogonal Frequency-Division Multiplexing Employing AFC for Time-Varying Doppler Shifts in Underwater Acoustic Communications |
Sub Title (in English) |
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Keyword(1) |
Underwater Acoustic Communications |
Keyword(2) |
Differential Orthogonal Frequency Division Multiplexing |
Keyword(3) |
Automatic Frequency Control |
Keyword(4) |
Tone Signal |
Keyword(5) |
Doubly-Selective Channels |
Keyword(6) |
Time-Varying Doppler Shifts |
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Keyword(8) |
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1st Author's Name |
Yui Nakai |
1st Author's Affiliation |
Ritsumeikan University (Ritsumeikan Univ.) |
2nd Author's Name |
Yuka Tanaka |
2nd Author's Affiliation |
Ritsumeikan University (Ritsumeikan Univ.) |
3rd Author's Name |
Hiroshi Kubo |
3rd Author's Affiliation |
Ritsumeikan University (Ritsumeikan Univ.) |
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Speaker |
Author-1 |
Date Time |
2020-01-24 12:35:00 |
Presentation Time |
25 minutes |
Registration for |
RCS |
Paper # |
IT2019-70, SIP2019-83, RCS2019-300 |
Volume (vol) |
vol.119 |
Number (no) |
no.376(IT), no.377(SIP), no.378(RCS) |
Page |
pp.197-202 |
#Pages |
6 |
Date of Issue |
2020-01-16 (IT, SIP, RCS) |
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