| Presentation | 2018-01-22 Performance evaluation on beam shapes and number of selected beams in a massive MIMO system Jumpei Yamamoto, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Yoshihisa Kishiyama, Daiki Takeda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In massive MIMO systems, there have already been several studies on 2-step beamforming that forms a precoder in a subspace after beam-space transformation. Here, the performance is affected by beam shapes and subspace selection strategies. In the paper, we evaluate the performance dependency on beam shapes: a DFT based beam, Chebyshev weighted beams, and Taylor weighted beams. In addition, we test various criteria for subspace selection: average power, instantaneous power, and channel correlation. The evaluation results show that higher throughputs can be obtained by the DFT beam when without process delay and by the Chebyshev beam when with channel transition for normalized Doppler frequency of 0.01. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | 5G / Massive MIMO / Higher frequency band / Hybrid beamforming |
| Paper # | IT2017-76,SIP2017-84,RCS2017-290 |
| Date of Issue | 2018-01-15 (IT, SIP, RCS) |
| Conference Information | |
| Committee | SIP / IT / RCS |
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| Conference Date | 2018/1/22(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Sunport Hall Takamatsu |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Masahiro Okuda(Univ. of Kitakyushu) / Masayoshi Ohashi(Fukuoka Univ.) / Hidekazu Murata(Kyoto Univ.) |
| Vice Chair | Shogo Muramatsu(Niigata Univ.) / Naoyuki Aikawa(TUS) / Jun Muramatsu(NTT) / Yukitoshi Sanada(Keio Univ.) / Eisuke Fukuda(Fujitsu Labs.) / Satoshi Suyama(NTT DoCoMo) |
| Secretary | Shogo Muramatsu(Chiba Inst. of Tech.) / Naoyuki Aikawa(Takushoku Univ.) / Jun Muramatsu(Yokohama College of Commerce) / Yukitoshi Sanada(UEC) / Eisuke Fukuda(Toshiba) / Satoshi Suyama(Hokkaido Univ.) |
| Assistant | Masayoshi Nakamoto(Hiroshima Univ.ひろ) / Sigeaki Kuzuoka(wakayama univ.) / Tetsuya Yamamoto(Panasonic) / Koichi Ishihara(NTT) / Kazushi Muraoka(NEC) / Shinsuke Ibi(Osaka Univ.) / Hiroshi Nishimoto(Mitsubishi Electric) |
| Paper Information | |
| Registration To | Technical Committee on Signal Processing / Technical Committee on Information Theory / 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) | Performance evaluation on beam shapes and number of selected beams in a massive MIMO system |
| Sub Title (in English) | |
| Keyword(1) | 5G |
| Keyword(2) | Massive MIMO |
| Keyword(3) | Higher frequency band |
| Keyword(4) | Hybrid beamforming |
| 1st Author's Name | Jumpei Yamamoto |
| 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 | Yoshihisa Kishiyama |
| 5th Author's Affiliation | NTT DOCOMO, INC.(NTT DOCOMO) |
| 6th Author's Name | Daiki Takeda |
| 6th Author's Affiliation | NTT DOCOMO, INC.(NTT DOCOMO) |
| Date | 2018-01-22 |
| Paper # | IT2017-76,SIP2017-84,RCS2017-290 |
| Volume (vol) | vol.117 |
| Number (no) | IT-394,SIP-395,RCS-396 |
| Page | pp.pp.125-130(IT), pp.125-130(SIP), pp.125-130(RCS), |
| #Pages | 6 |
| Date of Issue | 2018-01-15 (IT, SIP, RCS) |