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| Presentation | 2015-03-05 09:00 Influence of Analog Beamforming Configuration on Massive MIMO with Hybrid Beamforming in High Frequency Bands Satoshi Suyama, Tatsunori Obara, Jiyun Shen, Yukihiko Okumura (NTT DOCOMO)  RCS2014-337 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In order to tackle rapidly increasing traffic, 5th generation (5G) radio access network in mobile communications introduces Massive MIMO technology into small cells using higher frequency bands, and super high bit rate transmission realizing more than 10 Gbps data rate has been investigated. In Massive MIMO, from the point of view of realization, hybrid beamforming (BF) that combines analog BF with digital precoding has been proposed, and it has been verified that a throughput of more than 20 Gbps can be achieved by using 400 MHz bandwidth in the 20 GHz band and employing full-array type analog BF with all the antenna elements. In this report, we employ a sub-array type configuration using subsets of the antenna elements in our proposed joint analog BF and channel state information (CSI)-based precoding (FBCP), and present a beam search algorithm for such a configuration. Performances comparison between the full-array type and the sub-array type are made by link level simulations using 256-element uniform planar array. Furthermore, for the more realistic evaluation, some performances are shown by taking into account a phase error in both the variable phase shifter of the analog BF and the 90 degrees phase shifter of the quadrature modulator as hardware impairment. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | 5G / Higher frequency bands / Massive MIMO / Hybrid beamforming / Analog beamforming configuration / Hardware impairment / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 490, RCS2014-337, pp. 213-218, March 2015. | |
| Paper # | RCS2014-337 | |
| Date of Issue | 2015-02-25 (RCS) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | RCS2014-337 |
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| Conference Information | |
| Committee | RCS SR SRW |
| Conference Date | 2015-03-04 - 2015-03-06 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2015-03-RCS-SR-SRW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Influence of Analog Beamforming Configuration on Massive MIMO with Hybrid Beamforming in High Frequency Bands |
| Sub Title (in English) | |
| Keyword(1) | 5G |
| Keyword(2) | Higher frequency bands |
| Keyword(3) | Massive MIMO |
| Keyword(4) | Hybrid beamforming |
| Keyword(5) | Analog beamforming configuration |
| Keyword(6) | Hardware impairment |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Satoshi Suyama |
| 1st Author's Affiliation | NTT DOCOMO, INC. (NTT DOCOMO) |
| 2nd Author's Name | Tatsunori Obara |
| 2nd Author's Affiliation | NTT DOCOMO, INC. (NTT DOCOMO) |
| 3rd Author's Name | Jiyun Shen |
| 3rd Author's Affiliation | NTT DOCOMO, INC. (NTT DOCOMO) |
| 4th Author's Name | Yukihiko Okumura |
| 4th Author's Affiliation | NTT DOCOMO, INC. (NTT DOCOMO) |
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| Speaker | Author-1 |
| Date Time | 2015-03-05 09:00:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2014-337 |
| Volume (vol) | vol.114 |
| Number (no) | no.490 |
| Page | pp.213-218 |
| #Pages | 6 |
| Date of Issue | 2015-02-25 (RCS) |
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