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Paper Abstract and Keywords
Presentation 2023-08-31 16:20
[Encouragement Talk] Comparative study of channel coding methods for performance improvement in next-generation optical satellite data relay system
Eiji Okamoto, Yuma Yamashita (NITech), Yohei Satoh, Mitsuhiro Nakadai, Takamasa Itahashi, Shiro Yamakawa (JAXA) SAT2023-42
Abstract (in Japanese) (See Japanese page) 
(in English) Optical satellite data relay systems which send high-capacity data observed by low-orbit user satellites to geostationary relay satellites via optical links and then relays it to ground stations, can achieve immediacy and large capacity compared to direct transmission. The Japan Aerospace Exploration Agency (JAXA) is considering the development of the next optical data relay system following the optical satellite communication system "LUCAS" developed in 2020. In the past, we conducted simulation studies on channel coding methods for the next-generation optical data relay system, which enable fast and high-quality transmission within realistic computational constraints, and clarified that DVB-S2 channel code is excellent. However, the configurations of various parameters, such as code length, were limited and some conditions were different. Therefore, in this paper, we conducted a performance comparison of some codes with the same settings, considering the results of the previous study. Specifically, we focused on DVB-S2 code and LDPC code used in 5G, targeting short code length (16,200) and low encoding rate (0.25) that can strongly correct errors in optical satellite links, as well as long code length (64,800) and high encoding rate (0.8) that enable high-speed transmission in the entire system. As a result, it became clear that both DVB-S2 and LDPC codes have good characteristics for low and high coding rates, respectively.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical satellite data relay system / non-terrestrial network / return link / channel coding / 5G / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 171, SAT2023-42, pp. 41-45, Aug. 2023.
Paper # SAT2023-42 
Date of Issue 2023-08-24 (SAT) 
ISSN 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 SAT2023-42

Conference Information
Committee RCS SAT  
Conference Date 2023-08-31 - 2023-09-01 
Place (in Japanese) (See Japanese page) 
Place (in English) Naganoken Nokyo Building, and online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Satellite Communications, Broadcasting, Forward Error Correction, Wireless Communications, etc. 
Paper Information
Registration To SAT 
Conference Code 2023-08-RCS-SAT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Comparative study of channel coding methods for performance improvement in next-generation optical satellite data relay system 
Sub Title (in English)  
Keyword(1) Optical satellite data relay system  
Keyword(2) non-terrestrial network  
Keyword(3) return link  
Keyword(4) channel coding  
Keyword(5) 5G  
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Keyword(8)  
1st Author's Name Eiji Okamoto  
1st Author's Affiliation Nagoya Institute of Technology (NITech)
2nd Author's Name Yuma Yamashita  
2nd Author's Affiliation Nagoya Institute of Technology (NITech)
3rd Author's Name Yohei Satoh  
3rd Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
4th Author's Name Mitsuhiro Nakadai  
4th Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
5th Author's Name Takamasa Itahashi  
5th Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
6th Author's Name Shiro Yamakawa  
6th Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
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Speaker Author-1 
Date Time 2023-08-31 16:20:00 
Presentation Time 25 minutes 
Registration for SAT 
Paper # SAT2023-42 
Volume (vol) vol.123 
Number (no) no.171 
Page pp.41-45 
#Pages 5 
Date of Issue 2023-08-24 (SAT) 

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