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Paper Abstract and Keywords
Presentation 2007-05-18 13:25
FPGA Implementation of MIMO-OFDM Transmitter Using Simplified Subcarrier-Phase Hopping for PAPR Reduction
Yusuke Ishida, Satoshi Suyama, Hiroshi Suzuki, Kazuhiko Fukawa (Tokyo Tech) RCS2007-9
Abstract (in Japanese) (See Japanese page) 
(in English) In MIMO-OFDM mobile communications, Subcarrier Phase Hopping-Space Division Multiplexing (SPH-SDM) randomly rotates phases of the subcarrier signals, and thus can increase frequency diversity gain due to channel coding. To reduce peak to average power ratios (PAPRs) of signals transmitted by SPH-SDM, SPH-SLM and SBPH have also been proposed. SPH-SLM selects the optimum phase shift pattern to minimize the PAPR from predetermined patterns. On the other hand, SBPH performs phase shift for time-domain signals, and thus can reduce the number of IFFTs to require high complexity. However, a hardware verification of SPH-SLM in real time has shown that much large size electronic circuit is required for SPH-SLM. Therefore, this report shows how a SBPH transmitter can be implemented on FPGA board and details its structure and performance. This transmitter has two antennas for MIMO-OFDM and follows the wireless LAN standard. It can select the optimum phase shift pattern from 16 patterns in real time. As verification of the transmitter, we demonstrate that the transmitter can drastically reduce the peak power by investigating CCDF of PAPR of the transmitted signals which the FPGA board generates. Furthermore, a computer simulation obtains an average packet error rate (PER) over a fading channel by using information on the transmitted signals which the FPGA board provides, and shows that the average PER coincides with that of a whole computer simulation using the floating point. Finally, the transmitter is compared with that of SPH-SLM in terms of PAPR reduction, circuit size, and so on.
Keyword (in Japanese) (See Japanese page) 
(in English) Mobile communication / MIMO-OFDM / phase hopping / PAPR / phase pattern control / FPGA / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 38, RCS2007-9, pp. 47-52, May 2007.
Paper # RCS2007-9 
Date of Issue 2007-05-10 (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 RCS2007-9

Conference Information
Committee RCS IN  
Conference Date 2007-05-17 - 2007-05-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To RCS 
Conference Code 2007-05-RCS-IN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) FPGA Implementation of MIMO-OFDM Transmitter Using Simplified Subcarrier-Phase Hopping for PAPR Reduction 
Sub Title (in English)  
Keyword(1) Mobile communication  
Keyword(2) MIMO-OFDM  
Keyword(3) phase hopping  
Keyword(4) PAPR  
Keyword(5) phase pattern control  
Keyword(6) FPGA  
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Keyword(8)  
1st Author's Name Yusuke Ishida  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Satoshi Suyama  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Hiroshi Suzuki  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
4th Author's Name Kazuhiko Fukawa  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Speaker Author-1 
Date Time 2007-05-18 13:25:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2007-9 
Volume (vol) vol.107 
Number (no) no.38 
Page pp.47-52 
#Pages 6 
Date of Issue 2007-05-10 (RCS) 

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