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Paper Abstract and Keywords
Presentation 2014-03-03 13:20
A Study on Optimizations of Quantization Threshold for Decode-Quantize-Forward Relaying
Shinsuke Ibi, Seiichi Sampei (Osaka Univ.) RCS2013-336
Abstract (in Japanese) (See Japanese page) 
(in English) This paper investigates optimizations of threshold values involved in quantization of log likelihood ratio (LLR), which is derived at relay node in decode-quantize-and-forward (DQF) relaying. In order to carry out exact decoding for LLR compress encoder of DQF relaying, we explicitly define an equivalent LLR transfer signal model. Under the definition, we propose an efficient approximation, which drastically reduces computational efforts for decoding. After carefully inspecting impacts of the quantization threshold, decode-adaptive quantize-and-forward (DAQF) that adaptively selects optimal threshold according to channel states is proposed. Finally, we validate the proposed system by computer simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) Relay transmission / CoMP / DF / DQF / log likelihood ratio / quantization / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 456, RCS2013-336, pp. 181-186, March 2014.
Paper # RCS2013-336 
Date of Issue 2014-02-24 (RCS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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)
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Conference Information
Committee RCS SR SRW  
Conference Date 2014-03-03 - 2014-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Waseda Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2014-03-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Optimizations of Quantization Threshold for Decode-Quantize-Forward Relaying 
Sub Title (in English)  
Keyword(1) Relay transmission  
Keyword(2) CoMP  
Keyword(3) DF  
Keyword(4) DQF  
Keyword(5) log likelihood ratio  
Keyword(6) quantization  
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Keyword(8)  
1st Author's Name Shinsuke Ibi  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Seiichi Sampei  
2nd Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2014-03-03 13:20:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2013-336 
Volume (vol) vol.113 
Number (no) no.456 
Page pp.181-186 
#Pages
Date of Issue 2014-02-24 (RCS) 


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