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Paper Abstract and Keywords
Presentation 2022-08-25 16:15
[Encouragement Talk] Study on Error Correction in IP network to Compensate for Rain Attenuation in 21-GHz band Satellite Broadcasting
Yuki Koizumi, Yoichi Suzuki, Tomoya Kusunoki, Kazunori Yokohata (NHK) SAT2022-36
Abstract (in Japanese) (See Japanese page) 
(in English) We are developing a diverse reception system (DRS) which compensates for the rain attenuation in 21-GHz band by recovering satellite signals in a rainy area where it occasionally cannot be received correctly with signals from a sunny area via a best-effort (BE) - IP network. While the widespread BE-IP network makes it easy to deploy the DRS because of cost advantage, the packet loss occurring in the IP network should be considered. We considered to apply the error-correction code in satellite broadcasting to packet loss in IP network. Moreover, considering an advantage of using common error-correction code for both channels, we proposed a technique, namely “log-likelihood ratio (LLR) sharing”, which improves service availability of DRS by sharing LLRs of bits received via a satellite channel and an IP network.
In this report, we give an overview of DRS, and describe the structure of forward error correction encoder and decoder and its error-correction performance for an IP network. In addition, the mechanism of LLR sharing is explained and its effectiveness are demonstrated through computer simulation.
Keyword (in Japanese) (See Japanese page) 
(in English) Rain attenuation / 21GHz-band satellite broadcasting / Error correction / LDPC codes / LLR / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 163, SAT2022-36, pp. 42-47, Aug. 2022.
Paper # SAT2022-36 
Date of Issue 2022-08-18 (SAT) 
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 SAT2022-36

Conference Information
Committee SAT RCS  
Conference Date 2022-08-25 - 2022-08-26 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To SAT 
Conference Code 2022-08-SAT-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on Error Correction in IP network to Compensate for Rain Attenuation in 21-GHz band Satellite Broadcasting 
Sub Title (in English)  
Keyword(1) Rain attenuation  
Keyword(2) 21GHz-band satellite broadcasting  
Keyword(3) Error correction  
Keyword(4) LDPC codes  
Keyword(5) LLR  
1st Author's Name Yuki Koizumi  
1st Author's Affiliation NHK (NHK)
2nd Author's Name Yoichi Suzuki  
2nd Author's Affiliation NHK (NHK)
3rd Author's Name Tomoya Kusunoki  
3rd Author's Affiliation NHK (NHK)
4th Author's Name Kazunori Yokohata  
4th Author's Affiliation NHK (NHK)
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Speaker Author-1 
Date Time 2022-08-25 16:15:00 
Presentation Time 25 minutes 
Registration for SAT 
Paper # SAT2022-36 
Volume (vol) vol.122 
Number (no) no.163 
Page pp.42-47 
Date of Issue 2022-08-18 (SAT) 

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