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Paper Abstract and Keywords
Presentation 2010-03-05 11:30
A Study on Design of Turbo Code for Spectrum-Overlapped Resource Management
Jungo Goto, Kazunari Yokomakura, Osamu Nakamura, Hiroki Takahashi, Yasuhiro Hamaguchi (Sharp Corp.), Shinsuke Ibi, Seiichi Sampei (Osaka Univ.) RCS2009-313
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents a suitable design as turbo encoder for a spectrum-overlapped resource management (SORM) by using EXIT (EXtrinsic Information Transfer) analysis. In the SORM, since each user’s spectrum is allowed to overlap with the other users’ spectra, users are allocated to an arbitrary frequency positions having good channel conditions. The overlapped spectra are detected by a turbo equalizer which is applied as the receiver algorithm. Therefore, if iteration of the turbo equalizer successfully converges, inter-symbol interference (ISI) and inter-user interference (IUI) are completely canceled. However, at the first iteration, SINR (Signal to Interference and Noise Ratio) is low because of influencing these interferences. On the other hand, since turbo codes are optimized in the AWGN channel, error correction hardly work while SINR is lower than correctable SINR. Therefore, a turbo equalizer becomes poorer convergence property due to mismatch turbo decoder and equalizer while equalizer outputs low SINR caused by IUI such as the SORM. Consequently, the performance degrades in the case of using higher coding rate. This paper proposes turbo code with non-identical component encoder for turbo equalizer. We decide constraint length of component encoder according to its EXIT characteristic for improving convergence property and show that proposal turbo code in the SORM improves transmission performance in the higher coding rate.
Keyword (in Japanese) (See Japanese page) 
(in English) SORM / Turbo Equalization / EXIT Analyze / Turbo Code / Component Encoder / Constraint Length / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 440, RCS2009-313, pp. 321-326, March 2010.
Paper # RCS2009-313 
Date of Issue 2010-02-24 (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 RCS2009-313

Conference Information
Committee RCS AN MoNA SR  
Conference Date 2010-03-03 - 2010-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2010-03-RCS-AN-MoMuC-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Design of Turbo Code for Spectrum-Overlapped Resource Management 
Sub Title (in English)  
Keyword(1) SORM  
Keyword(2) Turbo Equalization  
Keyword(3) EXIT Analyze  
Keyword(4) Turbo Code  
Keyword(5) Component Encoder  
Keyword(6) Constraint Length  
Keyword(7)  
Keyword(8)  
1st Author's Name Jungo Goto  
1st Author's Affiliation Sharp Corporation (Sharp Corp.)
2nd Author's Name Kazunari Yokomakura  
2nd Author's Affiliation Sharp Corporation (Sharp Corp.)
3rd Author's Name Osamu Nakamura  
3rd Author's Affiliation Sharp Corporation (Sharp Corp.)
4th Author's Name Hiroki Takahashi  
4th Author's Affiliation Sharp Corporation (Sharp Corp.)
5th Author's Name Yasuhiro Hamaguchi  
5th Author's Affiliation Sharp Corporation (Sharp Corp.)
6th Author's Name Shinsuke Ibi  
6th Author's Affiliation Osaka University (Osaka Univ.)
7th Author's Name Seiichi Sampei  
7th Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2010-03-05 11:30:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2009-313 
Volume (vol) vol.109 
Number (no) no.440 
Page pp.321-326 
#Pages 6 
Date of Issue 2010-02-24 (RCS) 

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