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| Presentation | 2011-11-17 09:35 Experimental Analysis of Interference Mitigation Effect with beam tilt for Indoor WLAN systems Tomoki Murakami (NTT), Kentaro Murata (Iwate Univ), Riichi Kudo (NTT), Naoki Honma (Iwate Univ), Masato Mizoguchi (NTT)  AP2011-103 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Due to increasing deployment of wireless LAN access point (AP) in indoor environments, inter-cell interference (ICI) from nearby cells have increased. ICI degrades the spectral frequency utilization. In this paper, we present the experimental results of the ICI mitigation effect by beam tilt control with a vertical antenna array. The beam tilt control has mainly been applied by cellular systems to mitigate ICI. In cellular systems, the beam directivity directly relates to the cell layout because angular variance of refraction waves in outdoor environments is much smaller than that in indoor environment. ICI mitigation effect by beam tilt control is not clear in a multi-path rich environment. In order to clarify the ICI mitigation effect by the beam tilt control in an indoor environment, we measured Multiple Input Multiple Output (MIMO) channels between transmitter antennas with four horizontal and eight vertical antennas and receiver antennas with four horizontal antennas in office environment. We evaluated the effect of the beam tilt control using the measured MIMO channels. The experimental results showed that beam tilt control with eight vertical antennas achieves ICI mitigation effect by 20 % in an indoor environment. Furthermore, we found that capacities to desired receivers by the beam tilt control are also improved by 10 %. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Beam tilt / Inter cell interference (ICI) / Wireless LAN (WLAN) / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 288, AP2011-103, pp. 79-84, Nov. 2011. | |
| Paper # | AP2011-103 | |
| Date of Issue | 2011-11-09 (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 | AP2011-103 |
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| Conference Information | |
| Committee | AP RCS |
| Conference Date | 2011-11-16 - 2011-11-18 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya Congress Center |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Adaptive Antenna, Equalization, Interference Canceller, MIMO, Wireless Communication Systems, etc. |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2011-11-AP-RCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Experimental Analysis of Interference Mitigation Effect with beam tilt for Indoor WLAN systems |
| Sub Title (in English) | |
| Keyword(1) | Beam tilt |
| Keyword(2) | Inter cell interference (ICI) |
| Keyword(3) | Wireless LAN (WLAN) |
| Keyword(4) | |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tomoki Murakami |
| 1st Author's Affiliation | NIPPON TELEGRAPH AND TELEPHONE CORPORATION (NTT) |
| 2nd Author's Name | Kentaro Murata |
| 2nd Author's Affiliation | Iwate university (Iwate Univ) |
| 3rd Author's Name | Riichi Kudo |
| 3rd Author's Affiliation | NIPPON TELEGRAPH AND TELEPHONE CORPORATION (NTT) |
| 4th Author's Name | Naoki Honma |
| 4th Author's Affiliation | Iwate university (Iwate Univ) |
| 5th Author's Name | Masato Mizoguchi |
| 5th Author's Affiliation | NIPPON TELEGRAPH AND TELEPHONE CORPORATION (NTT) |
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| Speaker | Author-1 |
| Date Time | 2011-11-17 09:35:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2011-103 |
| Volume (vol) | vol.111 |
| Number (no) | no.288 |
| Page | pp.79-84 |
| #Pages | 6 |
| Date of Issue | 2011-11-09 (AP) |
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