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Paper Abstract and Keywords
Presentation 2018-06-22 15:40
VCM System with Only Variable Modulation Scheduling According to Satellite Elevation Angle
Chihaya Kato, Mitsuhiro Nakadai, Yajima Masanobu (JAXA) SANE2018-19
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, researches and developments of higher-order modulation and broadband telecommunication systems become more intensive in order to correspond to an increasing the capacity of observation data associated with the high performance of earth observation satellites. Japan Aerospace Exploration Agency (JAXA) has historically developed higher-order modulation and broadband telecommunication systems in the ALOS-2 satellite and so on. In order to further increase the data rate, we are working on the research and development of the Ka-band Direct Transmission (DT) system with higher-order modulation (32 APSK) based on the DVB-S2 standard. In this system, link feasibility at low elevation angles and applicability of high coding gain error correction code are issues. As the result of analysis and experimental evaluation to these issues, we found that high-speed VCM system based on the DVB-S2 standard with only variable modulation scheduling and the coding rate of 5/6 was suitable DT system.
Keyword (in Japanese) (See Japanese page) 
(in English) Earth Observation Satellite / High-speed telecommunication / 32APSK / Ka-band / VCM / LDPC code / Error floor /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 105, SANE2018-19, pp. 33-37, June 2018.
Paper # SANE2018-19 
Date of Issue 2018-06-15 (SANE) 
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)
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Conference Information
Committee SANE  
Conference Date 2018-06-22 - 2018-06-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Tsukuba Space Center, JAXA 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Space applications symposium, Mission for Space Science, Satellite technology and General issue 
Paper Information
Registration To SANE 
Conference Code 2018-06-SANE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) VCM System with Only Variable Modulation Scheduling According to Satellite Elevation Angle 
Sub Title (in English)  
Keyword(1) Earth Observation Satellite  
Keyword(2) High-speed telecommunication  
Keyword(3) 32APSK  
Keyword(4) Ka-band  
Keyword(5) VCM  
Keyword(6) LDPC code  
Keyword(7) Error floor  
1st Author's Name Chihaya Kato  
1st Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
2nd Author's Name Mitsuhiro Nakadai  
2nd Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
3rd Author's Name Yajima Masanobu  
3rd Author's Affiliation Japan Aerospace Exploration Agency (JAXA)
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Speaker Author-1 
Date Time 2018-06-22 15:40:00 
Presentation Time 25 minutes 
Registration for SANE 
Paper # SANE2018-19 
Volume (vol) vol.118 
Number (no) no.105 
Page pp.33-37 
Date of Issue 2018-06-15 (SANE) 

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