| Presentation | 2019-03-07 Parameter Estimation for Block Diagonalization based Beamforming in Analog-Digital-Hybrid Massive MIMO Systems Kenta Tsuge, Yuyuan Chang, Kazuhiko Fukawa, Satoshi Suyama, Yukihiko Okumura, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | For massive MIMO systems to be employed in the 5th generation mobile communications (5G), hybrid beamforming (HB), which is composed of the analog beamforming (AB) and the digital beamforming (DB), has been investigated because HB can decrease the number of baseband and RF circuits significantly and thus can reduce a much larger amount of the cost and power consumption than the full DB (FD) configuration, which requires one baseband and RF circuits for each antenna element. This report proposes a scheme to estimate both phases for phase rotators in AB and a precoding matrix for DB so that they can realize the block diagonalization (BD). Due to BD, HB can null interference from the undesired users and can form efficient transmit beams with low computational complexity.For time division duplex (TDD) multiuser MIMO communications, the proposed scheme estimates the FD channel matrix in the uplink (UL) and the phase for the phase rotators of AB in the downlink (DL).After obtaining an equivalent channel matrix from the estimated FD channel matrix and AB precoding matrix, the scheme estimates the DB precoding matrix in DL from the equivalent channel matrix so that HB can achieve BD in DL.Computer simulations demonstrate that the proposed scheme can achieve DL average bit error rate (BER) performances that are little inferior to those of FD. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | 5G / massive MIMO / hybrid beamforming / channel estimation / block diagonalization |
| Paper # | RCS2018-312 |
| Date of Issue | 2019-02-27 (RCS) |
| Conference Information | |
| Committee | RCS / SR / SRW |
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| Conference Date | 2019/3/6(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | YRP |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Chair | Tomoaki Otsuki(Keio Univ.) / Kenta Umebayashi(Tokyo Univ. of Agric. and Tech.) / Tadao Nakagawa(Tottori Univ.) |
| Vice Chair | Eisuke Fukuda(Fujitsu Labs.) / Satoshi Suyama(NTT Docomo) / Fumiaki Maehara(Waseda Univ.) / Masayuki Ariyoshi(NEC) / Suguru Kameda(Tohoku Univ.) / Satoshi Denno(Okayama Univ.) / Makoto Hamaminato(Fujitsu labs.) |
| Secretary | Eisuke Fukuda(Hokkaido Univ.) / Satoshi Suyama(NTT) / Fumiaki Maehara(NICT) / Masayuki Ariyoshi(ATR) / Suguru Kameda(Univ. of Electro-Comm.) / Satoshi Denno(Kyoto Univ.) / Makoto Hamaminato(Tokyo Inst. of Tech.) |
| Assistant | Kazushi Muraoka(NTT Docomo) / Shinsuke Ibi(Osaka Univ.) / Hiroshi Nishimoto(Mitsubishi Electric) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Gia Khanh Tran(Tokyo Inst. of Tech.) / Syusuke Narieda(Mie Univ.) / Koji Ohshima(Kozo Keikaku Engineering) / Mai Ohta(Fukuoka Univ.) / Teppei Oyama(Fujitsu Lab.) / Hiromasa Yamauchi(Fujitsu labs.) / Hanako Noda(Anritsu) |
| 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) | Parameter Estimation for Block Diagonalization based Beamforming in Analog-Digital-Hybrid Massive MIMO Systems |
| Sub Title (in English) | |
| Keyword(1) | 5G |
| Keyword(2) | massive MIMO |
| Keyword(3) | hybrid beamforming |
| Keyword(4) | channel estimation |
| Keyword(5) | block diagonalization |
| 1st Author's Name | Kenta Tsuge |
| 1st Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 2nd Author's Name | Yuyuan Chang |
| 2nd Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 3rd Author's Name | Kazuhiko Fukawa |
| 3rd Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 4th Author's Name | Satoshi Suyama |
| 4th Author's Affiliation | NTT DOCOMO,INC.(NTT DOCOMO) |
| 5th Author's Name | Yukihiko Okumura |
| 5th Author's Affiliation | NTT DOCOMO,INC.(NTT DOCOMO) |
| Date | 2019-03-07 |
| Paper # | RCS2018-312 |
| Volume (vol) | vol.118 |
| Number (no) | RCS-474 |
| Page | pp.pp.157-162(RCS), |
| #Pages | 6 |
| Date of Issue | 2019-02-27 (RCS) |