| Presentation | 2017-01-19 Study and experimental evaluation on 2-step beam search method in Millimeter-wave communications Chikara Kojima, Shunsuke Fujio, Ken-ichi Nishikawa, Kazuyuki Ozaki, Zhengyi Li, Atsushi Honda, Shohei Ishikawa, Takenori Ohshima, Hiroshi Ashida, Toshihiro Shimura, Masahiko Shimizu, Yoji Ohashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we study a two-step beam search method for a beamforming in Millimeter-wave and evaluate this method on experimental test. The fifth-generation mobile communication systems require more high-capacity and high throughput. Millimeter-wave communications are considered as a candidate to respond to the request. We have studied a space division multiple access with millimeter-wave beamforming and try to increase the capacity by controlling the directionality using high-gain narrow beams. In a space division multiple access using narrow beams, high precision beam search method is needed because a slight error of the estimated direction causes serious performance degradation. A conventional beam search method uses a large number of beams to enhance the precision, which results in the reduction of throughput. Therefore, two-step beam search methods in which a beam width changes at each step have been studied. In this paper, we evaluate the optimal number of beams in the case of multi users and indicate that the total beams are reduced when the precision at first step is higher and the number of beams at second step is fewer. The simulation results show that the optimal number of beams in which the performance is equal to that of one-step method is reduced by 45% of one-step method. Moreover, we make sure that the two-step beam search method is effective through actual equipment test and show the distribution of the direction estimation of the test is almost same as that of the expected value. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Millimeter-wave / Hybrid beamforming / Beam multiplexing / Interleave / Array Antenna / Beam Search |
| Paper # | IT2016-47,SIP2016-85,RCS2016-237 |
| Date of Issue | 2017-01-12 (IT, SIP, RCS) |
| Conference Information | |
| Committee | IT / SIP / RCS |
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| Conference Date | 2017/1/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Osaka City Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Signal Processing for Wireless Communications, Learning, Mathematical Science, Communication Theory, etc. |
| Chair | Masayoshi Ohashi(Fukuoka Univ.) / Makoto Nakashizuka(Chiba Inst. of Tech.) / Hidekazu Murata(Kyoto Univ.) |
| Vice Chair | Jun Muramatsu(NTT) / Masahiro Okuda(Univ. of Kitakyushu) / Shogo Muramatsu(Niigata Univ.) / Satoshi Denno(Okayama Univ.) / Yukitoshi Sanada(Keio Univ.) / Eisuke Fukuda(Fujitsu Labs.) |
| Secretary | Jun Muramatsu(Wakayama Univ.) / Masahiro Okuda(Yokohama College of Commerce) / Shogo Muramatsu(Ritsumeikan Univ.) / Satoshi Denno(Chiba Inst. of Tech.) / Yukitoshi Sanada(Toshiba) / Eisuke Fukuda(NTT DoCoMo) |
| Assistant | Mitsugu Iwamoto(Univ. of Electro-Comm.) / Osamu Watanabe(Takushoku Univ.) / Tetsuya Yamamoto(Panasonic) / Toshihiko Nishimura(Hokkaido Univ.) / Koichi Ishihara(NTT) / Kazushi Muraoka(NEC) / Shinsuke Ibi(Osaka Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Information Theory / Technical Committee on Signal Processing / Technical Committee on Radio Communication Systems |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study and experimental evaluation on 2-step beam search method in Millimeter-wave communications |
| Sub Title (in English) | |
| Keyword(1) | Millimeter-wave |
| Keyword(2) | Hybrid beamforming |
| Keyword(3) | Beam multiplexing |
| Keyword(4) | Interleave |
| Keyword(5) | Array Antenna |
| Keyword(6) | Beam Search |
| 1st Author's Name | Chikara Kojima |
| 1st Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 2nd Author's Name | Shunsuke Fujio |
| 2nd Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 3rd Author's Name | Ken-ichi Nishikawa |
| 3rd Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 4th Author's Name | Kazuyuki Ozaki |
| 4th Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 5th Author's Name | Zhengyi Li |
| 5th Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 6th Author's Name | Atsushi Honda |
| 6th Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 7th Author's Name | Shohei Ishikawa |
| 7th Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 8th Author's Name | Takenori Ohshima |
| 8th Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 9th Author's Name | Hiroshi Ashida |
| 9th Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 10th Author's Name | Toshihiro Shimura |
| 10th Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 11th Author's Name | Masahiko Shimizu |
| 11th Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| 12th Author's Name | Yoji Ohashi |
| 12th Author's Affiliation | FUJITSU LABORATORIES LTD.(FUJITSU LABORATORIES LTD.) |
| Date | 2017-01-19 |
| Paper # | IT2016-47,SIP2016-85,RCS2016-237 |
| Volume (vol) | vol.116 |
| Number (no) | IT-394,SIP-395,RCS-396 |
| Page | pp.pp.7-11(IT), pp.7-11(SIP), pp.7-11(RCS), |
| #Pages | 5 |
| Date of Issue | 2017-01-12 (IT, SIP, RCS) |