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Paper Abstract and Keywords
Presentation 2010-01-21 10:20
Nonlinear Distortion Reduction Methods by SLM and Clipping-and-Flitering for Eigenmode MIMO-OFDM Systems
Hiroto Adachi, Satoshi Suyama, Hiroshi Suzuki, Kazuhiko Fukawa (Tokyo Inst. of Tech.) SIP2009-75 RCS2009-209
Abstract (in Japanese) (See Japanese page) 
(in English) This report proposes a combination of Selected Mapping (SLM) and Clipping-and-Filtering (CF) for eigenmode (EM) MIMO-OFDM mobile communications; SLM selects a phase pattern to minimize nonlinear distortion by transmit power amplifier (PA) whereas CF surpresses out-of-band power spectrum radiation. In the EM MIMO-OFDM system, a transmitter performs linear precoding using channel state information (CSI) and thus excellent transmission performance can be achieved. However, the transmitted signal suffers from high peak to average power ratio (PAPR) as OFDM characteristics. To reduce such PAPR, EM transmission SLM (EM-SLM) has already been proposed, which is the enhancement of SLM known as a PAPR reduction method for OFDM without any performance degradation. When EM-SLM is applied to OFDM with a large number of subcarriers, however, EM-SLM with a limited number of phase patterns cannot achieve low PAPR. To cope with such a problem, this report proposes the combination of EM-SLM and CF known as a PAPR reduction method for OFDM. To operate PA with low back-off, CF reduces the peak power of transmitted signals and sufficiently surpresses out-of-band radiation by PA. Furthermore, a phase pattern controller for SLM selects a phase pattern under a criterion to minimize distortion by CF rather than that to minimize PAPR. Computer simulations demonstrate that the proposed method can alleviate performance degradation by nonlinear distortion due to both CF and PA while sufficiently suppressing the out-of-band radiation, in the case of $4\times 4$ EM MIMO-OFDM with the number of subcarriers being 1024.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile communication / MIMO-OFDM / Eigenmode / SLM / Clipping-and-Filtering / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 369, RCS2009-209, pp. 13-18, Jan. 2010.
Paper # RCS2009-209 
Date of Issue 2010-01-14 (SIP, 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 SIP2009-75 RCS2009-209

Conference Information
Committee RCS SIP  
Conference Date 2010-01-21 - 2010-01-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyushu Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal Processing, Circuit for Wireless Systems, Broadband Wireless Access Techniques, etc. 
Paper Information
Registration To RCS 
Conference Code 2010-01-RCS-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Nonlinear Distortion Reduction Methods by SLM and Clipping-and-Flitering for Eigenmode MIMO-OFDM Systems 
Sub Title (in English)  
Keyword(1) Mobile communication  
Keyword(2) MIMO-OFDM  
Keyword(3) Eigenmode  
Keyword(4) SLM  
Keyword(5) Clipping-and-Filtering  
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1st Author's Name Hiroto Adachi  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
2nd Author's Name Satoshi Suyama  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
3rd Author's Name Hiroshi Suzuki  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
4th Author's Name Kazuhiko Fukawa  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
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Speaker Author-1 
Date Time 2010-01-21 10:20:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # SIP2009-75, RCS2009-209 
Volume (vol) vol.109 
Number (no) no.368(SIP), no.369(RCS) 
Page pp.13-18 
#Pages 6 
Date of Issue 2010-01-14 (SIP, RCS) 

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