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Paper Abstract and Keywords
Presentation 2009-06-25 14:40
A study on FFT-based channel estimation in single carrier-frequency domain equalization
Daiji Motokawa, Eiji Okamoto, Yasunori Iwanami (Nagoya Inst. of Tech.) RCS2009-31
Abstract (in Japanese) (See Japanese page) 
(in English) A frequency domain equalization for multipath fading is widely used for OFDM (orthogonal frequency division multiplexing) in mobile communications. However, PAPR (peak to average power ratio) of OFDM is relatively high due to noise-like signal style of multi carrier (MC) transmission. On the other hand, PAPR of single carrier (SC) transmission is lower than that of MC and the SC is often applied to uplink transmission because of less requirement of amplifier linearity. In SC, the frequency domain equalizer called SC-FDE (single carrier-frequency domain equalization) is also used as well as MC, and to raise the transmission quality, accurate channel estimation is required for it. Usually in SC-FDE, whole one frame is assigned as a pilot frame used for channel estimation, which results in lower frequency efficiency. However, when we insert sparse pilot symbols in SC in the time domain, it spreads into whole bandwidth in the frequency domain, and they cannot be extracted as reference symbols at any subcarrier. To solve this problem, we propose a sparse pilot symbol based channel estimation scheme for SC-FDE using FFT (fast Fourier transform) fading estimation in which the pilot symbols are inserted periodically in the time and frequency sub domain. Furthermore, MMSE (minimum mean square error) fading estimation and SINR (signal to interference and noise ratio) criterion-based MMSE fading equalization are proposed. These schemes improve the BER (bit error ratio) performance in the time and frequency selective fading environment. The performance improvement is evaluated through computer simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) SC-FDE / FFT / PAPR / MMSE estimation / MMSE equalization with SINR criterion / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 105, RCS2009-31, pp. 21-26, June 2009.
Paper # RCS2009-31 
Date of Issue 2009-06-18 (RCS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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  
Conference Date 2009-06-25 - 2009-06-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya University 
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 2009-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on FFT-based channel estimation in single carrier-frequency domain equalization 
Sub Title (in English)  
Keyword(1) SC-FDE  
Keyword(2) FFT  
Keyword(3) PAPR  
Keyword(4) MMSE estimation  
Keyword(5) MMSE equalization with SINR criterion  
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Keyword(7)  
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1st Author's Name Daiji Motokawa  
1st Author's Affiliation Graduate School of Engineering Nagoya Institute of Technology (Nagoya Inst. of Tech.)
2nd Author's Name Eiji Okamoto  
2nd Author's Affiliation Graduate School of Engineering Nagoya Institute of Technology (Nagoya Inst. of Tech.)
3rd Author's Name Yasunori Iwanami  
3rd Author's Affiliation Graduate School of Engineering Nagoya Institute of Technology (Nagoya Inst. of Tech.)
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Speaker Author-1 
Date Time 2009-06-25 14:40:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2009-31 
Volume (vol) vol.109 
Number (no) no.105 
Page pp.21-26 
#Pages
Date of Issue 2009-06-18 (RCS) 


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