| Presentation | 2021-06-23 Considerations on computational complexity reduction in channel prediction based on multipath separation Daigo Mochizuki, 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 multi-user MIMO systems, a base station suppresses inter-user-interferences using downlink channel state information (CSI) for each user and achieve high-data rate transmission. We need to send pilot symbols frequently to obtain CSI in time varying environments. Channel prediction, however, can reduce the frequency of pilot transmission. Among channel prediction schemes, we can expect that the sum-of-sinusoids (SOS) method which separates, predicts, and reconstructs multipath components expands the prediction range of channels. It has been proposed to realize SOS channel prediction using FISTA, a method of compressed sensing. We need, however, to apply FISTA twice in the prediction, which requires large computational complexity. In this paper, we propose SOS channel prediction that uses FISTA and the least-mean square method. The technique needs FISTA only once, and the computational complexity is much less than the conventional method. It is also shown that the proposed method achieves excellent channel prediction. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | channel prediction / multipath / SOS method / compressed sensing / FISTA |
| Paper # | RCS2021-29 |
| 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) | Considerations on computational complexity reduction in channel prediction based on multipath separation |
| Sub Title (in English) | |
| Keyword(1) | channel prediction |
| Keyword(2) | multipath |
| Keyword(3) | SOS method |
| Keyword(4) | compressed sensing |
| Keyword(5) | FISTA |
| 1st Author's Name | Daigo Mochizuki |
| 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 | 2021-06-23 |
| Paper # | RCS2021-29 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-72 |
| Page | pp.pp.1-6(RCS), |
| #Pages | 6 |
| Date of Issue | 2021-06-16 (RCS) |