| Presentation | 2021-06-24 Comparison of Differential OFDM Systems Employing Multiple Differential Detection with Channel Prediction in Doubly Selective Channels Taichi Fujita, Kota Iwamoto, Hiroshi Kubo, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we compare the performance of differential orthogonal frequency division multiplexing (OFDM) for underwater acoustic communications (UWAC), which is a doubly selective channel with severe time and frequency selectivity. UWAC can be modelled as a sparse static channel with a large Doppler shift.Double differential OFDM has good performance when the Doppler shifts of each path in this channel are almost the same.However, when the Doppler shift of each path is different, the performance is degraded. In this paper, we evaluate the performance of differential OFDM employing multiple differential detection with channel prediction when the Doppler shift of each path is different.The modulation schemes used are DQPSK, DBPSK, DTC8PSK, and DTCQPSK.Finally, computer simulations show that differential OFDM under consideration has good characteristics when there is a difference in the Doppler shift of each path. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Orthogonal Frequency Division Multiplexing / Channel Prediction / Multiple Differential Detection / Trellis-Coded Modulation / Underwater Acoustic Communications |
| Paper # | RCS2021-56 |
| Date of Issue | 2021-06-16 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2021/6/23(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) |
| Vice Chair | Fumihide Kojima(NICT) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) |
| Secretary | Fumihide Kojima(Panasonic) / Toshihiko Nishimura(NEC) / Tomoya Tandai |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Comparison of Differential OFDM Systems Employing Multiple Differential Detection with Channel Prediction in Doubly Selective Channels |
| Sub Title (in English) | |
| Keyword(1) | Orthogonal Frequency Division Multiplexing |
| Keyword(2) | Channel Prediction |
| Keyword(3) | Multiple Differential Detection |
| Keyword(4) | Trellis-Coded Modulation |
| Keyword(5) | Underwater Acoustic Communications |
| 1st Author's Name | Taichi Fujita |
| 1st Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| 2nd Author's Name | Kota Iwamoto |
| 2nd Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| 3rd Author's Name | Hiroshi Kubo |
| 3rd Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| Date | 2021-06-24 |
| Paper # | RCS2021-56 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-72 |
| Page | pp.pp.163-168(RCS), |
| #Pages | 6 |
| Date of Issue | 2021-06-16 (RCS) |