| Presentation | 2021-03-05 [Encouragement Talk] A Study on Downlink Channel Estimation Based on Multipath Separation in a Wideband FDD System Shiori Tosaka, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara, Takanori Sato, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In an FDD system, downlink channel state information (CSI) is necessary at a base station for efficient transmission. The CSI estimated at user equipment using downlink pilot symbols is fed back to the base station. However, this method reduces transmission efficiency in a massive MIMO system. In this paper, we propose a method to estimate downlink CSI at a base station using an uplink pilot symbol and downlink CSI obtained with a pilot symbol from a single base station antenna. We separate uplink multipaths in the delay domain and spatial domain using 2D FISTA. Using the delays, directions of arrival, and the measured downlink CSI, we obtain the downlink CSI for all the base station antennas. It has been shown that although the estimation performance in a SIMO-OFDM system depends on the bandwidth, we can estimate the downlink CSI with the proposed technique. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | FDD / multipath separation / downlink channel estimation / FISTA |
| Paper # | RCS2020-261 |
| Date of Issue | 2021-02-24 (RCS) |
| Conference Information | |
| Committee | RCS / SR / SRW |
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| Conference Date | 2021/3/3(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) / Masayuki Ariyoshi(NEC) / Satoshi Denno(Okayama Univ.) |
| Vice Chair | Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Suguru Kameda(Tohoku Univ.) / Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Keiichi Mizutani(Kyoto Univ.) / Kentaro Saito(Tokyo Inst. of Tech.) / Hanako Noda(Anritsu) |
| Secretary | Fumiaki Maehara(Kyushu Univ.) / Toshihiko Nishimura(NEC) / Tomoya Tandai(ATR) / Suguru Kameda(Univ. of Electro-Comm.) / Osamu Takyu(Mie Univ.) / Kentaro Ishidu(NTT) / Keiichi Mizutani(NIigata Univ.) / Kentaro Saito / Hanako Noda |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Mai Ohta(Fukuoka Univ.) / Teppei Oyama(Fujitsu Lab.) / Kentaro Kobayashi(Nagoya Univ.) / Masaaki Fuse(Anritsu) / Akihito Noda(Nanzan Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems / Technical Committee on Smart Radio / Technical Committee on Short Range Wireless Communications |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Encouragement Talk] A Study on Downlink Channel Estimation Based on Multipath Separation in a Wideband FDD System |
| Sub Title (in English) | |
| Keyword(1) | FDD |
| Keyword(2) | multipath separation |
| Keyword(3) | downlink channel estimation |
| Keyword(4) | FISTA |
| 1st Author's Name | Shiori Tosaka |
| 1st Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| 2nd Author's Name | Toshihiko Nishimura |
| 2nd Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| 3rd Author's Name | Takeo Ohgane |
| 3rd Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| 4th Author's Name | Yasutaka Ogawa |
| 4th Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| 5th Author's Name | Junichiro Hagiwara |
| 5th Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| 6th Author's Name | Takanori Sato |
| 6th Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| Date | 2021-03-05 |
| Paper # | RCS2020-261 |
| Volume (vol) | vol.120 |
| Number (no) | RCS-404 |
| Page | pp.pp.267-272(RCS), |
| #Pages | 6 |
| Date of Issue | 2021-02-24 (RCS) |