| Presentation | 2020-11-26 Acceleration of Numerical Integration of Electric Field Specialized for Shallow Sea Position Estimation Nozomu Ishii, Masaharu Takahashi, Qiang Chen, Hiroshi Yoshida, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | air-sea two layer problem / electromagnetic field / infinitesimal dipole / Bessel function / double exponential-type quadrature formula / asymptotic extraction technique |
| Paper # | AP2020-84,RCS2020-123 |
| Date of Issue | 2020-11-18 (AP, RCS) |
| Conference Information | |
| Committee | RCS / AP |
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| Conference Date | 2020/11/25(3days) |
| 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. |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) / Qiang Chen(Tohoku Univ.) |
| Vice Chair | Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Satoru Kurokawa(AIST) |
| Secretary | Fumiaki Maehara(Kyushu Univ.) / Toshihiko Nishimura(NEC) / Tomoya Tandai(Tokyo Univ. of Agric. & Tech.) / Satoru Kurokawa(NTT DOCOMO) |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Dr. Kim(Niigata Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems / Technical Committee on Antennas and Propagation |
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| Language | JPN |
| 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 |
| 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) |
| Date | 2020-11-26 |
| Paper # | AP2020-84,RCS2020-123 |
| Volume (vol) | vol.120 |
| Number (no) | AP-248,RCS-249 |
| Page | pp.pp.60-65(AP), pp.75-80(RCS), |
| #Pages | 6 |
| Date of Issue | 2020-11-18 (AP, RCS) |