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Paper Abstract and Keywords
Presentation 2024-08-29 14:25
[Encouragement Talk] Performance evaluation of non-linear compensation for LDM transmission in satellite broadcasting system
Masaaki Kojima, Yuki Koizumi, Masashi Kamei (NHK) SAT2024-38
Abstract (in Japanese) (See Japanese page) 
(in English) We are exploring a satellite broadcasting system utilizing a layered division multiplexing (LDM) scheme, which multiplexes two modulation signals with different power levels within the same frequency band. This approach aims to provide flexible services in accordance with receiving conditions. The LDM scheme comprises a high-power upper layer signal and a low-power lower layer signal, allowing for acceptable transmission parameter settings. However, this scheme causes non-linear distortion in the satellite broadcasting system, as the amplifiers in a transponder operate with high power efficiency. The signal quality deteriorates due to this non-linear distortion, as the LDM scheme generates signals with amplitude variations. In this study, we employ compensation methods of digital pre-distortion (DPD) in a transmitter and pilot signals in a receiver and show improvements of the transmission performance through computer simulations. As an impact on LDM scheme by non-linear distortion, the different power levels of the modulation signals in the receiver might be changed from the one in the transmitter. We examine the different power levels of the received signal in LDM scheme under non-linear distortion and discuss their implications.
Keyword (in Japanese) (See Japanese page) 
(in English) LDM / DPD / Pilot signal / / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 165, SAT2024-38, pp. 33-38, Aug. 2024.
Paper # SAT2024-38 
Date of Issue 2024-08-22 (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 SAT2024-38

Conference Information
Committee SAT RCS  
Conference Date 2024-08-29 - 2024-08-30 
Place (in Japanese) (See Japanese page) 
Place (in English) CUL-PORT(Kochi City) (Temporary) 
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 2024-08-SAT-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance evaluation of non-linear compensation for LDM transmission in satellite broadcasting system 
Sub Title (in English)  
Keyword(1) LDM  
Keyword(2) DPD  
Keyword(3) Pilot signal  
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1st Author's Name Masaaki Kojima  
1st Author's Affiliation Japan Broadcasting Corporation (NHK)
2nd Author's Name Yuki Koizumi  
2nd Author's Affiliation Japan Broadcasting Corporation (NHK)
3rd Author's Name Masashi Kamei  
3rd Author's Affiliation Japan Broadcasting Corporation (NHK)
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Speaker Author-1 
Date Time 2024-08-29 14:25:00 
Presentation Time 25 minutes 
Registration for SAT 
Paper # SAT2024-38 
Volume (vol) vol.124 
Number (no) no.165 
Page pp.33-38 
#Pages 6 
Date of Issue 2024-08-22 (SAT) 

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