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Paper Abstract and Keywords
Presentation 2017-07-21 13:20
Demodulation Method of LPWA (Chirp Spread Spectrum)Signals and Multi-hop Transmisson Method -- Proposal of a Packet Collision Avoidance of CSS Signals and CSS-Packet Forwarding Method --
Yoshihiko Takeuchi (JRC), Chun-Hao Liao, Makoto Suzuki, Hiroyuki Morikawa (The Univ. of Tokyo) RCC2017-46 NS2017-63 RCS2017-138 SR2017-61 ASN2017-54
Abstract (in Japanese) (See Japanese page) 
(in English) In this work, we investigate a LPWA communication system that combines the chirp spread spectrum (CSS) and M-ary FSK modulation. We consider the matched filter (MF) has an effective CSS demodulator. The computational complexity of M-bank MF array with outputting only the data decision point is equivalent to the one MF implementation. Moreover, by using the MF, it is possible to achieve timing synchronization with an accuracy higher than the symbol time, which makes it feasible to be applied to sensor networks that require stringent concurrency. Furthermore, in order to improve the spectral efficiency of the M-ary FSK, we investigate a multiplexing scheme that uses multiple chirp signals. By inserting a timing lag longer than the inverse of the bandwidth, it is possible to separate the overlapped signal, and we propose a multi-hop concurrent transmission scheme with CSS.
Keyword (in Japanese) (See Japanese page) 
(in English) Internet of Things / Low Power Wide Area / chirp spread spectrum / CSS / multiplexing / concurrent transmission / multi-hop /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 132, RCS2017-138, pp. 233-238, July 2017.
Paper # RCS2017-138 
Date of Issue 2017-07-12 (RCC, NS, RCS, SR, ASN) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 RCC2017-46 NS2017-63 RCS2017-138 SR2017-61 ASN2017-54

Conference Information
Committee NS ASN RCC RCS SR  
Conference Date 2017-07-19 - 2017-07-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Distributed Network, M2M (Machine-to-Machine), D2D (Device-to-Device),etc. 
Paper Information
Registration To RCS 
Conference Code 2017-07-NS-ASN-RCC-RCS-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Demodulation Method of LPWA (Chirp Spread Spectrum)Signals and Multi-hop Transmisson Method 
Sub Title (in English) Proposal of a Packet Collision Avoidance of CSS Signals and CSS-Packet Forwarding Method 
Keyword(1) Internet of Things  
Keyword(2) Low Power Wide Area  
Keyword(3) chirp spread spectrum  
Keyword(4) CSS  
Keyword(5) multiplexing  
Keyword(6) concurrent transmission  
Keyword(7) multi-hop  
1st Author's Name Yoshihiko Takeuchi  
1st Author's Affiliation Japan Radio Co., Ltd. (JRC)
2nd Author's Name Chun-Hao Liao  
2nd Author's Affiliation The University of Tokyo (The Univ. of Tokyo)
3rd Author's Name Makoto Suzuki  
3rd Author's Affiliation The University of Tokyo (The Univ. of Tokyo)
4th Author's Name Hiroyuki Morikawa  
4th Author's Affiliation The University of Tokyo (The Univ. of Tokyo)
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Date Time 2017-07-21 13:20:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCC2017-46,IEICE-NS2017-63,IEICE-RCS2017-138,IEICE-SR2017-61,IEICE-ASN2017-54 
Volume (vol) IEICE-117 
Number (no) no.130(RCC), no.131(NS), no.132(RCS), no.133(SR), no.134(ASN) 
Page pp.179-184(RCC), pp.169-174(NS), pp.233-238(RCS), pp.191-196(SR), pp.205-210(ASN) 
#Pages IEICE-6 
Date of Issue IEICE-RCC-2017-07-12,IEICE-NS-2017-07-12,IEICE-RCS-2017-07-12,IEICE-SR-2017-07-12,IEICE-ASN-2017-07-12 

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