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| Presentation | 2015-02-19 10:55 Interference reduction characteristics by circular array based massive MIMO in a real microcell environment Ryochi Kataoka, Kentaro Nishimori (Niigata Univ.), Ngochao Tran, Tetsuro Imai (NTTdocomo)  AP2014-189 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Massive MIMO enables the improvement on the transmission rate without increasing the burden on the signal processing by employing a large number of antennas at a base station. Even if the interference cancellation techniques are not utilized, the interference signal can be mitigated thanks to a high beam resolution by the massive MIMO transmission using linear or planar array antenna. The authors have evaluated the effect by the massive MIMO in small cell environment using 2GHz band. In this report, we employ quantitative evaluation on the interference rejection when using a cylindrical array antenna at base station. The real propagation channel was measured in small cell environment in an urban area. One desired user and one interference user in adjacent cell are assumed to be located. We evaluate the characteristics of the interference rejection versus the number of elements in the vertical and horizontal plane. It is shown that a sufficient interference reduction using a maximum ratio combining cannot be obtained when using the cylindrical array. Moreover, it is shown that selection on the valid antennas in the horizontal plane for further improvement of transmission quality. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | massive MIMO / microcell / cylindrical array antenna / maximum ratio combining / zero forcing / channel sounder / cumulative probability distribution / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 450, AP2014-189, pp. 15-20, Feb. 2015. | |
| Paper # | AP2014-189 | |
| Date of Issue | 2015-02-12 (AP) | |
| 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 | AP2014-189 |
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| Conference Information | |
| Committee | AP |
| Conference Date | 2015-02-19 - 2015-02-20 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Chusho-kigyou center at Amagasaki-City |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Antennas and Propagation, Company special edition |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2015-02-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Interference reduction characteristics by circular array based massive MIMO in a real microcell environment |
| Sub Title (in English) | |
| Keyword(1) | massive MIMO |
| Keyword(2) | microcell |
| Keyword(3) | cylindrical array antenna |
| Keyword(4) | maximum ratio combining |
| Keyword(5) | zero forcing |
| Keyword(6) | channel sounder |
| Keyword(7) | cumulative probability distribution |
| Keyword(8) | |
| 1st Author's Name | Ryochi Kataoka |
| 1st Author's Affiliation | Niigata University (Niigata Univ.) |
| 2nd Author's Name | Kentaro Nishimori |
| 2nd Author's Affiliation | Niigata University (Niigata Univ.) |
| 3rd Author's Name | Ngochao Tran |
| 3rd Author's Affiliation | NTTdocomo (NTTdocomo) |
| 4th Author's Name | Tetsuro Imai |
| 4th Author's Affiliation | NTTdocomo (NTTdocomo) |
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| Speaker | Author-1 |
| Date Time | 2015-02-19 10:55:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2014-189 |
| Volume (vol) | vol.114 |
| Number (no) | no.450 |
| Page | pp.15-20 |
| #Pages | 6 |
| Date of Issue | 2015-02-12 (AP) |
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