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Paper Abstract and Keywords
Presentation 2017-08-18 13:00
Effects of Time and Space Diversity on Physical Cell ID Detection for NB-IoT
Aya Shimura, Mamoru Sawahashi (Tokyo City Univ.), Satoshi Nagata, Yoshihisa Kishiyama (NTT DOCOMO) RCS2017-164
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents the comprehensive effects of time and space diversity including precoding vector switching (PVS) transmit diversity and receive diversity on the physical cell ID (PCID) detection probability for narrowband (NB)-Internet-of-Things (IoT). Computer simulation results show that the PCID detection probability using PVS transmit diversity or receive diversity is improved by approximately 14 or 22%, respectively, compared to that for one-antenna transmission without receive diversity with the forgetting factor of $alpha$ = 0.125 for time diversity at the average received signal-to-noise power ratio (SNR) of - 3 dB. We also show that when using both PVS transmit and receive diversity, the PCID detection probability of approximately 92% is achieved even in for a low average received SNR such as - 5 dB. Hence, we conclude that PVS transmit diversity alone or together with receive diversity is effective in shortening the averaging time for computing the correlations of synchronization signals for time diversity. Decreasing the averaging time for time diversity leads to a reduction in the PCID detection time for IoT equipment.
Keyword (in Japanese) (See Japanese page) 
(in English) NB-IoT / cell search / synchronization signal / PVS transmit diversity / receive diversity / time diversity / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 175, RCS2017-164, pp. 111-116, Aug. 2017.
Paper # RCS2017-164 
Date of Issue 2017-08-10 (RCS) 
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 RCS2017-164

Conference Information
Committee RCS SAT  
Conference Date 2017-08-17 - 2017-08-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Niigata Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Satellite Communications, Broadcasting, Error Correction, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2017-08-RCS-SAT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effects of Time and Space Diversity on Physical Cell ID Detection for NB-IoT 
Sub Title (in English)  
Keyword(1) NB-IoT  
Keyword(2) cell search  
Keyword(3) synchronization signal  
Keyword(4) PVS transmit diversity  
Keyword(5) receive diversity  
Keyword(6) time diversity  
Keyword(7)  
Keyword(8)  
1st Author's Name Aya Shimura  
1st Author's Affiliation Tokyo City University (Tokyo City Univ.)
2nd Author's Name Mamoru Sawahashi  
2nd Author's Affiliation Tokyo City University (Tokyo City Univ.)
3rd Author's Name Satoshi Nagata  
3rd Author's Affiliation NTT DOCOMO (NTT DOCOMO)
4th Author's Name Yoshihisa Kishiyama  
4th Author's Affiliation NTT DOCOMO (NTT DOCOMO)
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Speaker Author-1 
Date Time 2017-08-18 13:00:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2017-164 
Volume (vol) vol.117 
Number (no) no.175 
Page pp.111-116 
#Pages 6 
Date of Issue 2017-08-10 (RCS) 

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