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Paper Abstract and Keywords
Presentation 2008-08-27 17:15
A Study on multilevel modulation considering nonlinear power amplifier characteristic
A. T. Le, Kiyomichi Araki (Titech) RCS2008-69
Abstract (in Japanese) (See Japanese page) 
(in English) Adaptive modulation \& coding (AMC) increases the throughput of a wireless network by adjusting modulation, power, coding to the channel status. By sending more information in good conditions (good SNR) and less information in bad conditions
(bad SNR), AMC can provide high speed stabilized communication. On the other hand, improvement on power efficiency has lately attracted considerable attention, and there are demands for full utilizing power sources without any waste. In the transmitter, power amplifier consumes most of the power; our study researches performance of various modulation type considering power amplifier characteristic. We use Rapp's model for modelling non-linear characteristic of power amplifier, evaluate performance of conventional multi-level modulation such as PSK, QAM. Furthermore, we research some constellation diagram types of multi-level modulation and propose multiple concentric circles constellation which matches non-linear characteristic of power amplifier.
Keyword (in Japanese) (See Japanese page) 
(in English) Adaptive modulation coding / QAM / PSK / APSK / power amplifier / non-linear / constellation diagram /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 188, RCS2008-69, pp. 97-102, Aug. 2008.
Paper # RCS2008-69 
Date of Issue 2008-08-20 (RCS) 
ISSN Print edition: ISSN 0913-5685    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 RCS2008-69

Conference Information
Committee RCS  
Conference Date 2008-08-27 - 2008-08-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To RCS 
Conference Code 2008-08-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on multilevel modulation considering nonlinear power amplifier characteristic 
Sub Title (in English)  
Keyword(1) Adaptive modulation coding  
Keyword(2) QAM  
Keyword(3) PSK  
Keyword(4) APSK  
Keyword(5) power amplifier  
Keyword(6) non-linear  
Keyword(7) constellation diagram  
Keyword(8)  
1st Author's Name A. T. Le  
1st Author's Affiliation Tokyo Institute of Technology (Titech)
2nd Author's Name Kiyomichi Araki  
2nd Author's Affiliation Tokyo Institute of Technology (Titech)
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Speaker Author-1 
Date Time 2008-08-27 17:15:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2008-69 
Volume (vol) vol.108 
Number (no) no.188 
Page pp.97-102 
#Pages 6 
Date of Issue 2008-08-20 (RCS) 

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