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| Presentation | 2014-01-24 11:20 Experimental Study on Channel Properties in the 2GHz Band in Crowded Urban Small-Cell Environment Kentaro Saito, Tetsuro Imai, Ngochao Tran, Yukihiko Okumura (NTT DOCOMO)  AP2013-163 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Owing to the wide spread of Long Term Evolution (LTE), the capacity of cellular system has increased. However the user traffic volume in the cellular network has been growing more rapidly due to the spreads of smart phones and tablet computers. Recently, in the crowded area such as urban railway station vicinities the capacity enhancement technique using the small-cells architecture is examined. Small cell BSs are compact and low-power, and will be placed on the roadside devices such as advertising displays and vending machines. However the applicability of current MIMO channel models in those short-distance and low-BS-height environments is not figured out. Especially, although there are a great number of pedestrians in urban areas, the influences of pedestrians to the MIMO channel models are not figured out. In this paper, to investigate those issues, we carried out the channel sounding in the crowded urban railway station vicinity in the 2GHz band. And to figure out the influence of pedestrians to channel properties, we measured the channel both in the daytime and in the midnight. As the result of comparing the measured data and ITU-R M.2135 channel model, we showed that the delay spread and the AoDazm spread differed from the values of ITU-R model. As the result of comparing the data in the daytime and the data in the midnight, we showed that the received power of daytime was about 4dB lower than the received power of midnight due to the path-blocking by the pedestrians. Delay spread also decreased in the daytime. In addition, we showed that in the daytime , the AoAelv spread increased since the proportion of rays that propagated over the pedestrians increased. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Small Cell / Urban Micro / Human-body Shadowing / 2GHz band / MIMO Channel Model / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 113, no. 384, AP2013-163, pp. 169-174, Jan. 2014. | |
| Paper # | AP2013-163 | |
| Date of Issue | 2014-01-15 (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 | AP2013-163 |
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| Conference Information | |
| Committee | AP |
| Conference Date | 2014-01-22 - 2014-01-24 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hozan Hall (Kagoshima Prefectural Culture Center) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Antennas and Propagation |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2014-01-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Experimental Study on Channel Properties in the 2GHz Band in Crowded Urban Small-Cell Environment |
| Sub Title (in English) | |
| Keyword(1) | Small Cell |
| Keyword(2) | Urban Micro |
| Keyword(3) | Human-body Shadowing |
| Keyword(4) | 2GHz band |
| Keyword(5) | MIMO Channel Model |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Kentaro Saito |
| 1st Author's Affiliation | NTT DOCOMO INC. (NTT DOCOMO) |
| 2nd Author's Name | Tetsuro Imai |
| 2nd Author's Affiliation | NTT DOCOMO INC. (NTT DOCOMO) |
| 3rd Author's Name | Ngochao Tran |
| 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 | 2014-01-24 11:20:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2013-163 |
| Volume (vol) | vol.113 |
| Number (no) | no.384 |
| Page | pp.169-174 |
| #Pages | 6 |
| Date of Issue | 2014-01-15 (AP) |
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