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| Presentation | 2020-11-26 09:50 Acceleration of Numerical Integration of Electric Field Specialized for Shallow Sea Position Estimation Nozomu Ishii (Niigata Univ.), Masaharu Takahashi (Chiba Univ.), Qiang Chen (Tohoku Univ.), Hiroshi Yoshida (JAMSTEC)  AP2020-84 RCS2020-123 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The authors have studied shallow a location system in the shallow sea using electromagnetic fields. In this case, it is necessary to evaluate the electromagnetic fields radiated from an infinitesimal dipole antenna on the transceiver. By using electromagnetic field simulation such as FDTD or approximate expressions that include the contribution of lateral waves, we can approximately estimate electromagnetic field distribution generated by the infinitesimal dipole antenna at a depth of about 10m from the sea surface at the frequency of 10kHz. However, in order to obtain this distribution, FDTD needs to be calculated in advance over a huge amount of time, and the approximate expressions may not always be applicable depending on the frequency and distance. In this manuscript, we review the problem of two layers that consist of the air and the sea water, and focus on the fact that the corresponding exact formula of the electromagnetic field is given in the integral form. In other words, we report the points to be noted in numerical integration for the problem, and further shortened the calculation time for numerical integration. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | air-sea two layer problem / electromagnetic field / infinitesimal dipole / Bessel function / double exponential-type quadrature formula / asymptotic extraction technique / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 248, AP2020-84, pp. 60-65, Nov. 2020. | |
| Paper # | AP2020-84 | |
| Date of Issue | 2020-11-18 (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 | AP2020-84 RCS2020-123 |
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| Conference Information | |
| Committee | RCS AP UWT |
| Conference Date | 2020-11-25 - 2020-11-27 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2020-11-RCS-AP-UWT |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Acceleration of Numerical Integration of Electric Field Specialized for Shallow Sea Position Estimation |
| Sub Title (in English) | |
| Keyword(1) | air-sea two layer problem |
| Keyword(2) | electromagnetic field |
| Keyword(3) | infinitesimal dipole |
| Keyword(4) | Bessel function |
| Keyword(5) | double exponential-type quadrature formula |
| Keyword(6) | asymptotic extraction technique |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Nozomu Ishii |
| 1st Author's Affiliation | Niigata University (Niigata Univ.) |
| 2nd Author's Name | Masaharu Takahashi |
| 2nd Author's Affiliation | Chiba University (Chiba Univ.) |
| 3rd Author's Name | Qiang Chen |
| 3rd Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 4th Author's Name | Hiroshi Yoshida |
| 4th Author's Affiliation | Japan Agency of Marine-Earth Science and Technology (JAMSTEC) |
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| Speaker | Author-1 |
| Date Time | 2020-11-26 09:50:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2020-84, RCS2020-123 |
| Volume (vol) | vol.120 |
| Number (no) | no.248(AP), no.249(RCS) |
| Page | pp.60-65(AP), pp.75-80(RCS) |
| #Pages | 6 |
| Date of Issue | 2020-11-18 (AP, RCS) |
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