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Paper Abstract and Keywords
Presentation 2014-06-17 10:05
A Design of MIMO Decoder using LLR Approximation without Maximum Value Calculation
Reina Hongyo, Thi Hong Tran, Hiroshi Ochi (Kyusyu Inst. of Tech.) RCS2014-39
Abstract (in Japanese) (See Japanese page) 
(in English) In Multiple Input Multiple Output (MIMO) decoders, soft decision bits in the form of Log Likelihood Ratio (LLR) are often used to obtain high error correction capability when used with an outer error correcting code. LLR plays an important role in signal detection, but due to its high complexity, research for complexity reduction of LLR hardware complexity is needed. In this paper, we propose a design of MIMO decoder using LLR approximation with low complexity achieved by approximating the maximum value calculation. Our proposed method approximate LLR using the bit shift of the minimum value already calculated. We show that our proposed design can reduce 27% of the circuit size and the power consumption while maintaining the Bit Error Rate (BER) performance of the conventional method.
Keyword (in Japanese) (See Japanese page) 
(in English) IEEE802.11ac / MIMO decoder / LLR / Hardware design / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 86, RCS2014-39, pp. 43-48, June 2014.
Paper # RCS2014-39 
Date of Issue 2014-06-10 (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 RCS2014-39

Conference Information
Committee RCS  
Conference Date 2014-06-17 - 2014-06-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa-ken Seinenkaikan (Naha) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Resource Control, Scheduling, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2014-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Design of MIMO Decoder using LLR Approximation without Maximum Value Calculation 
Sub Title (in English)  
Keyword(1) IEEE802.11ac  
Keyword(2) MIMO decoder  
Keyword(3) LLR  
Keyword(4) Hardware design  
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1st Author's Name Reina Hongyo  
1st Author's Affiliation Kyusyu Institute of Technology (Kyusyu Inst. of Tech.)
2nd Author's Name Thi Hong Tran  
2nd Author's Affiliation Kyusyu Institute of Technology (Kyusyu Inst. of Tech.)
3rd Author's Name Hiroshi Ochi  
3rd Author's Affiliation Kyusyu Institute of Technology (Kyusyu Inst. of Tech.)
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Speaker Author-1 
Date Time 2014-06-17 10:05:00 
Presentation Time 8 minutes 
Registration for RCS 
Paper # RCS2014-39 
Volume (vol) vol.114 
Number (no) no.86 
Page pp.43-48 
#Pages 6 
Date of Issue 2014-06-10 (RCS) 

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