| Presentation | 2020-11-27 Differential OFDM Employing Joint Detection for Underwater Acoustic Communications Hiroshi Kubo, Yuka Tanaka, Yui Nakai, Tetsuro Kubo, Haruka Toyota, Yoshitaka Yamamoto, Kouki Toyoda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | his paper discusses differential orthogonal frequency division multiplexing (OFDM) employing joint detection (JD) for underwater acoustic communications (UWACs) in the presence of severe double selectivity, where JD can estimate channel and data simultaneously. JD is effective for severe doubly-selective environment, because JD can detect data without pilot-symbols for its channel estimation. However, even differential OFDM needs frequent synchronization word (SW) insertion, in order to track fast time-varying SW timing. If differential OFDM performs differential encoding only for time direction and data detection by means of JD, there is no constraint for its phase differences between subcarriers. Thus, this differential OFDM can employ a subcarrier phase offset (SPO) scheme, whose subcarrier reference phase is equal to Zadoff-Chu (ZC) sequence of SW. SPO differential OFDM can improve transmission information efficiency, because JD can operate continuously through multiple frames. Finally, computer simulation confirms performance of SPO differential OFDM in UWAC environment. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Multi-Carrier Modulation Scheme / Differential OFDM / Joint Detection / Doubly-Selective Channels / Underwater Acoustic Communications |
| Paper # | AP2020-89,RCS2020-131 |
| 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) | Differential OFDM Employing Joint Detection for Underwater Acoustic Communications |
| Sub Title (in English) | |
| Keyword(1) | Multi-Carrier Modulation Scheme |
| Keyword(2) | Differential OFDM |
| Keyword(3) | Joint Detection |
| Keyword(4) | Doubly-Selective Channels |
| Keyword(5) | Underwater Acoustic Communications |
| 1st Author's Name | Hiroshi Kubo |
| 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 | Yui Nakai |
| 3rd Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| 4th Author's Name | Tetsuro Kubo |
| 4th Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| 5th Author's Name | Haruka Toyota |
| 5th Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| 6th Author's Name | Yoshitaka Yamamoto |
| 6th Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| 7th Author's Name | Kouki Toyoda |
| 7th Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| Date | 2020-11-27 |
| Paper # | AP2020-89,RCS2020-131 |
| Volume (vol) | vol.120 |
| Number (no) | AP-248,RCS-249 |
| Page | pp.pp.84-89(AP), pp.116-121(RCS), |
| #Pages | 6 |
| Date of Issue | 2020-11-18 (AP, RCS) |