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| Presentation | 2019-11-22 15:05 [Invited Lecture] Study on Underwater Acoustic Communication using Time-Reversal DFE -- Application for MIMO and Multiuser Communication -- Takuya Shimura, Mitsuyasu Deguchi, Yukihiro Kida, Yoshitakawa Watanabe (JAMSTEC)  AP2019-139 RCS2019-234 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In underwater acoustic communication, effects of multipath interferences and Doppler shift are much larger than those in radio communication in air, and available bandwidth is much narrower. To overcome these problems, time-reversal decision feedback equalizer (DFE) is effective especially in horizontal communication because multipath signals are collected and utilized. Additionally, adaptive time reversal was proposed to suppress co-channel or multiuser interference as well as multipath interference by using the focusing effect. In this study, adaptive passive time-reversal DFE is applied to multiple-input/multiple-output (MIMO) communication and multiuser communication, and its effectiveness is investigated in simulation, tank experiment, and at-sea experiment. As results, in tank experiment of MIMO communication, in case of using orthogonal frequency division multiplexing (OFDM), it is impossible to increase the number of MIMO transmitter channels. In the meantime, in case of using adaptive passive time-reversal DFE, the spectral efficiency is not degraded as increasing the number of channel and it is possible to achieve 5×12 MIMO communication at the efficiency of 16.7bps/Hz. In at-sea experiment for multiuser communication, it was demonstrated that adaptive passive time-reversal DFE can realize multiuser communication with a transmitter moving at the velocity of 2 knots. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | underwater acoustic communication / time reversal / phase conjugate / adaptive time reversal / decision feedback equalizer (DFE) / multiple-input/multiple-output (MIMO) / orthogonal frequency division multiplexing (OFDM) / spatial division multiplexing (SDM) | |
| Reference Info. | IEICE Tech. Rep., vol. 119, no. 296, RCS2019-234, pp. 175-180, Nov. 2019. | |
| Paper # | RCS2019-234 | |
| Date of Issue | 2019-11-13 (AP, 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 | AP2019-139 RCS2019-234 |
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| Conference Information | |
| Committee | AP RCS |
| Conference Date | 2019-11-20 - 2019-11-22 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Saga Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2019-11-AP-RCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on Underwater Acoustic Communication using Time-Reversal DFE |
| Sub Title (in English) | Application for MIMO and Multiuser Communication |
| Keyword(1) | underwater acoustic communication |
| Keyword(2) | time reversal |
| Keyword(3) | phase conjugate |
| Keyword(4) | adaptive time reversal |
| Keyword(5) | decision feedback equalizer (DFE) |
| Keyword(6) | multiple-input/multiple-output (MIMO) |
| Keyword(7) | orthogonal frequency division multiplexing (OFDM) |
| Keyword(8) | spatial division multiplexing (SDM) |
| 1st Author's Name | Takuya Shimura |
| 1st Author's Affiliation | Japan Agency for Marine-Earth Science and Technology (JAMSTEC) |
| 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 | Yoshitakawa Watanabe |
| 4th Author's Affiliation | Japan Agency for Marine-Earth Science and Technology (JAMSTEC) |
| Speaker | Author-1 |
| Date Time | 2019-11-22 15:05:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | AP2019-139, RCS2019-234 |
| Volume (vol) | vol.119 |
| Number (no) | no.295(AP), no.296(RCS) |
| Page | pp.181-186(AP), pp.175-180(RCS) |
| #Pages | 6 |
| Date of Issue | 2019-11-13 (AP, RCS) |
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