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| Presentation | 2007-04-19 13:05 Effect of Vertical Beam Shaping for Base Station Antenna in Mobile Communication System -- Optimization with Genetic Algorithm -- Junpei Mizuno, Tetsuro Imai (NTTDoCoMo)  AP2007-5 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In mobile communication system using cellular, an ideal vertical pattern of base station antenna is supposed that the pattern provides equal received power in own cell and influence of interference to others is small. As base station antenna, we use array antenna that elements are arranged vertically. However, we can not get such an ideal antenna pattern because the aperture area which is determined by antenna length and distance of each element is definite. And in this case, the optimized pattern depends on the target system. In this document, we set W-CDMA system as the target and evaluate the beam shaping effect with using the genetic algorithm to maximize the downlink capacity. The result is that there is a flex between the quantity of element and increase of downlink capacity by the optimization. In fact, the increase is kept at most about 1.1 times larger than normalized antenna pattern until particular quantity of elements, but beyond the quantity, the increase of downlink capacity meets sudden growth. And we show that the quantity of element on the flex increases with the radius of cell and that the radius is 1km, then the flex needs about 40 elements. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Vertical beam shaping / Optimization / Genetic Algorithm / W-CDMA / System Capacity / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 3, AP2007-5, pp. 25-30, April 2007. | |
| Paper # | AP2007-5 | |
| Date of Issue | 2007-04-12 (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 | AP2007-5 |
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| Conference Information | |
| Committee | AP |
| Conference Date | 2007-04-19 - 2007-04-19 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kwansei Gakuin Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | etc. |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2007-04-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Effect of Vertical Beam Shaping for Base Station Antenna in Mobile Communication System |
| Sub Title (in English) | Optimization with Genetic Algorithm |
| Keyword(1) | Vertical beam shaping |
| Keyword(2) | Optimization |
| Keyword(3) | Genetic Algorithm |
| Keyword(4) | W-CDMA |
| Keyword(5) | System Capacity |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Junpei Mizuno |
| 1st Author's Affiliation | NTT DoCoMo, Inc. (NTTDoCoMo) |
| 2nd Author's Name | Tetsuro Imai |
| 2nd Author's Affiliation | NTT DoCoMo, Inc. (NTTDoCoMo) |
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| Speaker | Author-1 |
| Date Time | 2007-04-19 13:05:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2007-5 |
| Volume (vol) | vol.107 |
| Number (no) | no.3 |
| Page | pp.25-30 |
| #Pages | 6 |
| Date of Issue | 2007-04-12 (AP) |
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