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Paper Abstract and Keywords
Presentation 2013-09-13 10:35
A study on electromagnetic interference to telecommunication equipment due to WiFi radio waves
Norihito Hirasawa, Ken Okamoto, Hidenori Itou, Masashi Takahashi (NTT East), Yuichiro Okugawa, Yoshiharu Akiyama (NTT), Kazuo Murakawa (NTT East) EMCJ2013-49
Abstract (in Japanese) (See Japanese page) 
(in English) Wireless communication services can be used at various places by development of wireless communication technologies. To make maintenance works be more efficient, telecommunication operator requests for using the wireless communication devices, such as a tablet PC, in machine rooms of telecommunication center and data center where wireless communication devices are not permitted to use. So, it is necessary to evaluate the immunity levels of the telecommunication equipment is enough higher than electromagnetic field strength of transmitting wave from the wireless communication devices to use the devices in the machine room. In the international standard, narrow band signal that is 1 kHz tone 80% amplitude modulation (AM) signal which simulates the radio wave is used as the test signals. On the contrary, wide band signals such as an OFDM signal are currently used for wireless communication devices. In this report, we compared radiated electromagnetic field immunity test results against several types of telecommunications equipment by using the wireless LAN signal and 1 kHz tone 80% AM signal.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless LAN / telecommunication equipment / broadband signal / OFDM / immunity / EMI / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 218, EMCJ2013-49, pp. 1-5, Sept. 2013.
Paper # EMCJ2013-49 
Date of Issue 2013-09-06 (EMCJ) 
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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Conference Information
Committee EMCJ  
Conference Date 2013-09-13 - 2013-09-13 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Biomedical EMC, etc. 
Paper Information
Registration To EMCJ 
Conference Code 2013-09-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on electromagnetic interference to telecommunication equipment due to WiFi radio waves 
Sub Title (in English)  
Keyword(1) Wireless LAN  
Keyword(2) telecommunication equipment  
Keyword(3) broadband signal  
Keyword(4) OFDM  
Keyword(5) immunity  
Keyword(6) EMI  
Keyword(7)  
Keyword(8)  
1st Author's Name Norihito Hirasawa  
1st Author's Affiliation Nippon Telegraph and Telephone East Corporation (NTT East)
2nd Author's Name Ken Okamoto  
2nd Author's Affiliation Nippon Telegraph and Telephone East Corporation (NTT East)
3rd Author's Name Hidenori Itou  
3rd Author's Affiliation Nippon Telegraph and Telephone East Corporation (NTT East)
4th Author's Name Masashi Takahashi  
4th Author's Affiliation Nippon Telegraph and Telephone East Corporation (NTT East)
5th Author's Name Yuichiro Okugawa  
5th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
6th Author's Name Yoshiharu Akiyama  
6th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
7th Author's Name Kazuo Murakawa  
7th Author's Affiliation Nippon Telegraph and Telephone East Corporation (NTT East)
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Speaker Author-1 
Date Time 2013-09-13 10:35:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2013-49 
Volume (vol) vol.113 
Number (no) no.218 
Page pp.1-5 
#Pages 5 
Date of Issue 2013-09-06 (EMCJ) 

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