| Presentation | 2021-10-21 [Poster Presentation] Performance Improvement of Multiuser Massive MIMO Null-Space Expansion Kazuki Maruta, Kabuto Arai, Nobutaka Funaki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A significant challenge of the multiuser multiple-input multiple-output (MIMO) is the interference leakage among user terminals caused by the channel time variation due to their mobility, which significantly degrades the transmission performance. In massive MIMO using hundreds of antenna elements at the base station side, null-space expansion is previously proposed to improve the robustness of multiuser spatial multiplexing even under the mobility environment. It performs null-steering to past interference channel state information, fully exploiting the huge spatial degree of freedom that massive antenna elements bring. Its performance depends on the distribution of spatial degrees of freedom used for beam/null-steering. Focusing on the above viewpoints, this paper introduces various methods for further performance improvement. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Massive MIMO / Null-space expansion / Time varying channel |
| Paper # | RCS2021-130 |
| Date of Issue | 2021-10-14 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2021/10/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless Communication Schemes, Wireless Communication Systems, Wireless Standards, Future Wireless Systems, etc. |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) |
| Vice Chair | Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) |
| Secretary | Toshihiko Nishimura(NEC) / Tomoya Tandai(Panasonic) / Fumihide Kojima |
| 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) | [Poster Presentation] Performance Improvement of Multiuser Massive MIMO Null-Space Expansion |
| Sub Title (in English) | |
| Keyword(1) | Massive MIMO |
| Keyword(2) | Null-space expansion |
| Keyword(3) | Time varying channel |
| 1st Author's Name | Kazuki Maruta |
| 1st Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 2nd Author's Name | Kabuto Arai |
| 2nd Author's Affiliation | Chiba University(Chiba Univ.) |
| 3rd Author's Name | Nobutaka Funaki |
| 3rd Author's Affiliation | Chiba University(Chiba Univ.) |
| Date | 2021-10-21 |
| Paper # | RCS2021-130 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-210 |
| Page | pp.pp.63-63(RCS), |
| #Pages | 1 |
| Date of Issue | 2021-10-14 (RCS) |