Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2013-02-01 09:50
Investigation on LLR Computation at Decoder Input for Receiver Diversity Using Low-Rate Turbo Code for DFT-Precoded OFDMA
Keita Miwa (Tokyo City Univ.), Teruo Kawamura, Nobuhiko Miki (NTT DOCOMO), Mamoru Sawahashi (Tokyo City Univ.) SIP2012-114 RCS2012-271
Abstract (in Japanese) (See Japanese page) 
(in English) This paper investigates log-likelihood ratio (LLR) generation methods at decoder input for antenna receiver diversity using low-rate turbo code in discrete Fourier transform (DFT)-precoded orthogonal frequency division multiple access (OFDMA). First method is to generate LLR by combining the individual computed LLR at each receiver diversity branch (hereafter, LLR computation based on individual LLR combining). Second method is to generate LLR from the diversity-combined signal after frequency domain equalizer (FDE) (hereafter, LLR computation using combined signal after FDE). Computer simulation results show when channel codding rate is equal or smaller than approximately R = 1/5, LLR computation using combined signal after FDE achieves almost same average block error rate (BLER) performance level as that for LLR computation based on individual LLR combining. We show, however, that the required average received signal-to-noise power ratio (SNR) at the average BLER of 10-2 of LLR computation using combined signal after FDE is decreased by approximately 0.5 dB compared to that for LLR computation based on individual LLR combining when R is high such as 3/4.
Keyword (in Japanese) (See Japanese page) 
(in English) Single-carrier FDMA / Low-rate turbo code / Log-likelihood ratio / Frequency domain equalizer / Channel estimation / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 424, RCS2012-271, pp. 195-200, Jan. 2013.
Paper # RCS2012-271 
Date of Issue 2013-01-24 (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 SIP2012-114 RCS2012-271

Conference Information
Committee SIP RCS  
Conference Date 2013-01-31 - 2013-02-01 
Place (in Japanese) (See Japanese page) 
Place (in English) Viewport-Kure-Hotel (Kure) 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To RCS 
Conference Code 2013-01-SIP-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation on LLR Computation at Decoder Input for Receiver Diversity Using Low-Rate Turbo Code for DFT-Precoded OFDMA 
Sub Title (in English)  
Keyword(1) Single-carrier FDMA  
Keyword(2) Low-rate turbo code  
Keyword(3) Log-likelihood ratio  
Keyword(4) Frequency domain equalizer  
Keyword(5) Channel estimation  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Keita Miwa  
1st Author's Affiliation Tokyo City University (Tokyo City Univ.)
2nd Author's Name Teruo Kawamura  
2nd Author's Affiliation NTT DOCOMO (NTT DOCOMO)
3rd Author's Name Nobuhiko Miki  
3rd Author's Affiliation NTT DOCOMO (NTT DOCOMO)
4th Author's Name Mamoru Sawahashi  
4th Author's Affiliation Tokyo City University (Tokyo City Univ.)
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2013-02-01 09:50:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # SIP2012-114, RCS2012-271 
Volume (vol) vol.112 
Number (no) no.423(SIP), no.424(RCS) 
Page pp.195-200 
#Pages 6 
Date of Issue 2013-01-24 (SIP, RCS) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan