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Paper Abstract and Keywords
Presentation 2013-11-22 11:35
Differential Space Time Block Coding using QAM Signals in First Modulation
Shusaku Umeda, Yasunori Kato, Kaoru Tsukamoto, Akihiro Okazaki, Fumio Ishizu (Mitsubishi Electric) RCS2013-199
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a new Differential Space-Time Block Coding (DSTBC) method that can apply non-constant envelope modulation, by suppressing increase of the amplitude variation. DSTBC is the method that is a combination of differential coding and space-time block coding. It can achieve transmit diversity without channel information, and it is tolerant of fading. However, as a first-modulation signals, DSTBC cannot apply non-constant envelope modulation, such as QAM (Quadrature Amplitude Modulation) and APSK (Amplitude Phase Shift Keying). Differential coding with non-constant envelope modulation get higher variance of signal amplitudes as the size of frame is larger. High amplitude variation causes the high PAPR, then DSTBC suffers from waveform distortion caused by a nonlinear transmit power amplifier. Furthermore, DSTBC-OFDM, the combination of DSTBC and OFDM (Orthogonal Frequency Division Multiplexing), with non-constant envelope modulation, degrades the performance because of the increase of probability of the signals with the remarkably small power. The proposed method, power normalized DSTBC can reduce the expansion of amplitude variation and realize the transmit diversity, by normalizing the differential signals by previous signal amplitude. Computer simulations demonstrate that power normalized DSTBC can alleviate the amplitude variation of differential signals, and improve the FER performance in AWGN channels.
Keyword (in Japanese) (See Japanese page) 
(in English) DSTBC / Transmit Diversity / QAM / Non-Constant Envelope Modulation / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 301, RCS2013-199, pp. 147-152, Nov. 2013.
Paper # RCS2013-199 
Date of Issue 2013-11-13 (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 AP  
Conference Date 2013-11-20 - 2013-11-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Matsue Terrsa 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antenna, Equalization, Interference Canceller, MIMO, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2013-11-RCS-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Differential Space Time Block Coding using QAM Signals in First Modulation 
Sub Title (in English)  
Keyword(1) DSTBC  
Keyword(2) Transmit Diversity  
Keyword(3) QAM  
Keyword(4) Non-Constant Envelope Modulation  
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1st Author's Name Shusaku Umeda  
1st Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
2nd Author's Name Yasunori Kato  
2nd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
3rd Author's Name Kaoru Tsukamoto  
3rd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
4th Author's Name Akihiro Okazaki  
4th Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
5th Author's Name Fumio Ishizu  
5th Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
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Speaker Author-1 
Date Time 2013-11-22 11:35:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2013-199 
Volume (vol) vol.113 
Number (no) no.301 
Page pp.147-152 
#Pages
Date of Issue 2013-11-13 (RCS) 


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