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Paper Abstract and Keywords
Presentation 2019-03-07 11:20
Iterative Separate Detection for Collided Packets over Space-based AIS Channels
Seiya Shimizu, Yuyuan Chang, Kazuhiko Fukawa (Tokyo Tech), Daichi Hirahara (JAXA) RCS2018-316
Abstract (in Japanese) (See Japanese page) 
(in English) Employing satellites makes Automatic Identification System (AIS) signals available across the open oceans. As such a satellite system, JAXA has conducted an experiment named Space-based AIS Experiment (SPAISE) in Japan where satellites equipped with AIS receivers have been launched, and observed AIS signals suffering from the Doppler shift. The results show that the wide coverage of the satellites causes a collision of multiple AIS signal packets, which degrades their transmission performance severely. To cope with such collided packets, a separate detection scheme using SIC (Successive Interference Cancellation) has been investigated. However, the scheme can hardly achieve desired bit error rates (BERs) because the accuracy of the channel parameter estimation is insufficient. Therefore, this report proposes a decision-directed scheme to estimate the channel parameters more accurately by calculating correlation between detected data signals plus known pilot signals with received signals. To improve the BER performance furthermore, multiple-symbol combined differential detection is used rather than the simple differential detection. Computer simulations under Rician fading conditions clarify the improvement of the proposed scheme.
Keyword (in Japanese) (See Japanese page) 
(in English) Automatic Identification System (AIS) / Space-based AIS / correlation detection / SIC / decision-directed estimation / multiple-symbol combined differential detection / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 474, RCS2018-316, pp. 181-186, March 2019.
Paper # RCS2018-316 
Date of Issue 2019-02-27 (RCS) 
ISSN 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 RCS2018-316

Conference Information
Committee RCS SR SRW  
Conference Date 2019-03-06 - 2019-03-08 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2019-03-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Iterative Separate Detection for Collided Packets over Space-based AIS Channels 
Sub Title (in English)  
Keyword(1) Automatic Identification System (AIS)  
Keyword(2) Space-based AIS  
Keyword(3) correlation detection  
Keyword(4) SIC  
Keyword(5) decision-directed estimation  
Keyword(6) multiple-symbol combined differential detection  
1st Author's Name Seiya Shimizu  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Yuyuan Chang  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Kazuhiko Fukawa  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
4th Author's Name Daichi Hirahara  
4th Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
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Speaker Author-1 
Date Time 2019-03-07 11:20:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2018-316 
Volume (vol) vol.118 
Number (no) no.474 
Page pp.181-186 
Date of Issue 2019-02-27 (RCS) 

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