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Paper Abstract and Keywords
Presentation 2011-12-16 13:40
Iterative Decision-Feedback Channel Estimation for Turbo SIC in DFT-Precoded OFDMA Using QO-STBC
Lianjun Deng (Tokyo City Univ.), Teruo Kawamura (NTT DOCOMO), Hidekazu Taoka (DOCOMO Europe Labs..), Mamoru Sawahashi (Tokyo City Univ.) RCS2011-257
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes using iterative decision-feedback channel estimation (IDFCE) in a turbo soft interference canceller (SIC) for a quasi-orthogonal (QO) - space-time block code (STBC) with four antennas in discrete Fourier transform (DFT)-precoded orthogonal frequency division multiple access (OFDMA). In the proposed method, channel estimation (CE) is updated at each turbo SIC iteration loop by using soft-symbol estimation based on the log-likelihood ratio (LLR) of an extrinsic probability at the Max-Log-MAP (maximum a posteriori probability) decoder output. Hence, the accuracy of the generated residual inter-code interference (ICI) due to non-orthogonality in the QO-STBC improves in the turbo SIC, which leads to improvement in the achievable performance. Computer simulation results show that by applying the proposed IDFCE in the turbo SIC, the required average received signal-to-noise power ratio (SNR) at the average block error rate (BLER) of 10-2 is decreased by approximately 1.5 and 1.0 dB compared to those for STBC using reference signal (RS) based CE and DFCE, respectively, for the coding rate of R = 1/3 in turbo code. Hence, the IDFCE works cooperatively in the turbo SIC to decrease the ICI in the full rate QO-STBC.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile communications / Single-Carrier FDMA / Transmit diversity / QO-STBC / Turbo SIC / Channel estimation / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 345, RCS2011-257, pp. 147-152, Dec. 2011.
Paper # RCS2011-257 
Date of Issue 2011-12-08 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 NS RCS  
Conference Date 2011-12-15 - 2011-12-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Yamaguchi University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Ad-hoc Network, Ubiquitous Network, Wireless Communication, security, Multi-Access Network 
Paper Information
Registration To RCS 
Conference Code 2011-12-NS-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Iterative Decision-Feedback Channel Estimation for Turbo SIC in DFT-Precoded OFDMA Using QO-STBC 
Sub Title (in English)  
Keyword(1) Mobile communications  
Keyword(2) Single-Carrier FDMA  
Keyword(3) Transmit diversity  
Keyword(4) QO-STBC  
Keyword(5) Turbo SIC  
Keyword(6) Channel estimation  
1st Author's Name Lianjun Deng  
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 Hidekazu Taoka  
3rd Author's Affiliation DOCOMO Communications Laboratories Europe GmbH (DOCOMO Europe Labs..)
4th Author's Name Mamoru Sawahashi  
4th Author's Affiliation Tokyo City University (Tokyo City Univ.)
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Date Time 2011-12-16 13:40:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2011-257 
Volume (vol) IEICE-111 
Number (no) no.345 
Page pp.147-152 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2011-12-08 

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