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Paper Abstract and Keywords
Presentation 2009-03-04 09:00
Parameter Optimization Speed Improvement for Multi-carrier Signals in An Adaptive Predistortion Method Based on Orthogonal Polynomial Expansion
Isamu Kaneko, Osamu Muta, Yoshihiko Akaiwa (Kyushu Univ.) RCS2008-212
Abstract (in Japanese) (See Japanese page) 
(in English) Adaptive predistorter is an effective technique to compensate nonlinear distortion in power amplifier.
As a method to improve the parameter convergence speed in the predistorter, a series expansion technique with orthogonal polynomials has been proposed.
In this paper, we propose a method to improve parameter optimization speed by individually adjusting the step size corresponding to each orthogonal polynomial.
Computer simulation results for OFDM and W-CDMA signals show that the proposed method is effective in improving the parameter optimization speed of the predistorter for a power amplifier affected by memory effect.
In addition, we also show that power efficiency is further improved by combining the predistortion with peak-to-average power ratio reduction technique for OFDM signal.
Keyword (in Japanese) (See Japanese page) 
(in English) Adaptive predistorter / Orthogonal polynomial expansion / Nonlinear distortion compensation / Step size / Memory effect / OFDM / PAPR reduction /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 445, RCS2008-212, pp. 1-6, March 2009.
Paper # RCS2008-212 
Date of Issue 2009-02-25 (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 RCS2008-212

Conference Information
Committee RCS AN MoNA SR  
Conference Date 2009-03-04 - 2009-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Workshop on Mobile Communications 
Paper Information
Registration To RCS 
Conference Code 2009-03-RCS-AN-MoMuC-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Parameter Optimization Speed Improvement for Multi-carrier Signals in An Adaptive Predistortion Method Based on Orthogonal Polynomial Expansion 
Sub Title (in English)  
Keyword(1) Adaptive predistorter  
Keyword(2) Orthogonal polynomial expansion  
Keyword(3) Nonlinear distortion compensation  
Keyword(4) Step size  
Keyword(5) Memory effect  
Keyword(6) OFDM  
Keyword(7) PAPR reduction  
Keyword(8)  
1st Author's Name Isamu Kaneko  
1st Author's Affiliation Kyushu University (Kyushu Univ.)
2nd Author's Name Osamu Muta  
2nd Author's Affiliation Kyushu University (Kyushu Univ.)
3rd Author's Name Yoshihiko Akaiwa  
3rd Author's Affiliation Kyushu University (Kyushu Univ.)
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Speaker Author-1 
Date Time 2009-03-04 09:00:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2008-212 
Volume (vol) vol.108 
Number (no) no.445 
Page pp.1-6 
#Pages 6 
Date of Issue 2009-02-25 (RCS) 

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