| Presentation | 2023-03-03 Simultaneous Beam Search with Multiple Distributed Antennas for Distributed Antenna System Shuki Wai, Takuto Arai, Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Distributed antenna (DA) system using high-frequency bands such as millimeter-wave and sub-terahertz is expected to be one of promising method to increase remarkably the capacity of future wireless communications. Because the high-frequency bands system can provide a wider bandwidth than the conventional wireless communications and the distributed antenna system improves the spatial multiplexing transmission performance by reducing spatial correlations of the MIMO(Multi-Input Multi-Output) channel in LoS(Line-of-Sight) environments. However, the overhead of beam searching for antennas beamforming in the system is larger than the conventional wireless communications, because the beamwidth of antennas is needed to be narrower to compensate large propagation attenuation of the high frequency bands and the beams searching are needed to be operated for all of the DAs. In this paper, in order to solve the problem, we propose simultaneous beam search scheme in which multiple DAs simultaneously search optimal beam the same frequency resource, so that the overhead is independent of the number of DAs. Numerical simulations and experimental evaluations show that for most of the evaluated user equipment (UE) locations, the reduced level of received power at the UE due to the DA/beam selected by the proposed method is less than 4.15 dB compared to the DA/beam selected by the conventional method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Beam search / Millimeter wave / Sub-terahertz wave / Distributed antenna System |
| Paper # | RCS2022-295 |
| Date of Issue | 2023-02-22 (RCS) |
| Conference Information | |
| Committee | RCS / SR / SRW |
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| Conference Date | 2023/3/1(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Institute of Technology, and Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Chair | Kenichi Higuchi(Tokyo Univ. of Science) / Suguru Kameda(Hiroshima Univ.) / Hanako Noda(Anritsu) |
| Vice Chair | Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) / Osamu Muta(Kyushu Univ.) / Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Kazuto Yano(ATR) / Keiichi Mizutani(Kyoto Univ.) / Kentaro Saito(Tokyo Denki Univ.) / Hirokazu Sawada(NICT) |
| Secretary | Tomoya Tandai(Panasonic) / Fumihide Kojima(Univ. of Electro-Comm) / Osamu Muta(Sharp) / Osamu Takyu(Mie Univ.) / Kentaro Ishidu(Tokai Univ.) / Kazuto Yano(NTT) / Keiichi Mizutani(KUT) / Kentaro Saito(NIigata Univ.) / Hirokazu Sawada |
| Assistant | Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Issei Kanno(KDDI Research) / Yuyuan Chang(Tokyo Inst. of Tech) / Kazuki Maruta(Tokyo Univ. of Science) / Mai Ohta(NEC) / WANG Xiaoyan(Ibaraki Univ.) / Akemi Tanaka(MathWorks) / Katsuya Suto(Univ. of Electro-Comm) / Maki Arai(Nihon Univ.) / Yuichi Masuda(Univ. of Tokyo) |
| 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) | Simultaneous Beam Search with Multiple Distributed Antennas for Distributed Antenna System |
| Sub Title (in English) | |
| Keyword(1) | Beam search |
| Keyword(2) | Millimeter wave |
| Keyword(3) | Sub-terahertz wave |
| Keyword(4) | Distributed antenna System |
| 1st Author's Name | Shuki Wai |
| 1st Author's Affiliation | NTT Corporation(NTT) |
| 2nd Author's Name | Takuto Arai |
| 2nd Author's Affiliation | NTT Corporation(NTT) |
| 3rd Author's Name | Tatsuhiko Iwakuni |
| 3rd Author's Affiliation | NTT Corporation(NTT) |
| 4th Author's Name | Daisei Uchida |
| 4th Author's Affiliation | NTT Corporation(NTT) |
| 5th Author's Name | Naoki Kita |
| 5th Author's Affiliation | NTT Corporation(NTT) |
| Date | 2023-03-03 |
| Paper # | RCS2022-295 |
| Volume (vol) | vol.122 |
| Number (no) | RCS-399 |
| Page | pp.pp.249-254(RCS), |
| #Pages | 6 |
| Date of Issue | 2023-02-22 (RCS) |