Paper Abstract and Keywords |
Presentation |
2006-05-18 13:30
Measurements of wideband propagation characteristics in railway tunnel Yutaka Imaizumi, Kiyoshi Kobayashi, Hiroaki Tsunoda, Kohei Ohata (NTT), Masakatsu Yoshizawa, Seiji Imai (JR-CENTRAL) SAT2006-1 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
We are examining the application of a Ku-band mobile satellite communication system as a means to offer broadband communication services, for example, the Internet connection service, to passengers in a train. To secure uninterrupted communication using the satellite, we are considering application of terrestrial repeaters, generally known as gap-fillers, as shadowing countermeasure technologies against longer obstacles such as tunnels. To design the gap-filler for the train that runs at high speed in the tunnel, the wideband propagation characteristic in the tunnel should be clarified. This paper describes the measured results and analysis on the wideband propagation characteristic in the railway tunnel. The results are as follows. 1) The degradation of the reception level doesn't depend on the tunnel shape. 2) The propagation loss in the vicinity of the transmission antenna is smaller than the free space path loss. 3) The degradation of the reception level by the presence of the oncoming train is the sum of the degradation due to the tunnel itself and the degradation due to the train. 4) The delay spread is insignificant when the high gain antenna is used for the receiving antenna. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Railway / Tunnel / Wideband propagation / Delay spread / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 106, no. 39, SAT2006-1, pp. 1-6, May 2006. |
Paper # |
SAT2006-1 |
Date of Issue |
2006-05-11 (SAT) |
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) |
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SAT2006-1 |
Conference Information |
Committee |
AP SAT |
Conference Date |
2006-05-18 - 2006-05-19 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Kagoshima Univ. |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Satellite Communications and Antennas and Propagation |
Paper Information |
Registration To |
SAT |
Conference Code |
2006-05-AP-SAT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Measurements of wideband propagation characteristics in railway tunnel |
Sub Title (in English) |
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Keyword(1) |
Railway |
Keyword(2) |
Tunnel |
Keyword(3) |
Wideband propagation |
Keyword(4) |
Delay spread |
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1st Author's Name |
Yutaka Imaizumi |
1st Author's Affiliation |
NipponTelegraph and Telephone Corporation (NTT) |
2nd Author's Name |
Kiyoshi Kobayashi |
2nd Author's Affiliation |
NipponTelegraph and Telephone Corporation (NTT) |
3rd Author's Name |
Hiroaki Tsunoda |
3rd Author's Affiliation |
NipponTelegraph and Telephone Corporation (NTT) |
4th Author's Name |
Kohei Ohata |
4th Author's Affiliation |
NipponTelegraph and Telephone Corporation (NTT) |
5th Author's Name |
Masakatsu Yoshizawa |
5th Author's Affiliation |
Central Japan Railway Company (JR-CENTRAL) |
6th Author's Name |
Seiji Imai |
6th Author's Affiliation |
Central Japan Railway Company (JR-CENTRAL) |
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Speaker |
Author-1 |
Date Time |
2006-05-18 13:30:00 |
Presentation Time |
25 minutes |
Registration for |
SAT |
Paper # |
SAT2006-1 |
Volume (vol) |
vol.106 |
Number (no) |
no.39 |
Page |
pp.1-6 |
#Pages |
6 |
Date of Issue |
2006-05-11 (SAT) |
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