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Paper Abstract and Keywords
Presentation 2009-07-29 13:00
[Technology Exhibit] FPGA Implementation of Transmit Beamforming in IEEE802.11n
Toshihisa Nabetani, Yoshimasa Egashira, Yoriko Utsunomiya, Daisuke Takeda (Toshiba) SR2009-33
Abstract (in Japanese) (See Japanese page) 
(in English) To improve communication robustness and extend transmission range, Multiple Input Multiple Output (MIMO) transmit beamforming method has been extensively studied and adopted in the IEEE802.11n draft standard. In transmit beamforming, not only the delay associated with CSI (Channel State Information) feedback protocol but also factors associated with implementation, such as processing delay time and distortion of analog devices, degrade the performance because of lowering the channel correlation. Because these implementation constraints depend on each implementation greatly, it is conceivable that transmit beamforming cannot achieve significant gains in some cases depending on the implementation. In this paper, we implement a prototype of transmit beamforming in IEEE802.11n capable of real-time processing using FPGA and evaluate performances in an actual environment, which is an office room. Our measurement results show that our prototype can achieve lower packet error rate compared with the normal IEEE802.11n without transmit beamforming. Moreover, we report behavior synthesis in our implementation.
Keyword (in Japanese) (See Japanese page) 
(in English) IEEE802.11n / Transmit Beamforming / FPGA / / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 155, SR2009-33, pp. 69-75, July 2009.
Paper # SR2009-33 
Date of Issue 2009-07-22 (SR) 
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 SR  
Conference Date 2009-07-29 - 2009-07-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo institute of technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Exibition, reconfigurable hardware, and 10th anniversary ceremony 
Paper Information
Registration To SR 
Conference Code 2009-07-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) FPGA Implementation of Transmit Beamforming in IEEE802.11n 
Sub Title (in English)  
Keyword(1) IEEE802.11n  
Keyword(2) Transmit Beamforming  
Keyword(3) FPGA  
1st Author's Name Toshihisa Nabetani  
1st Author's Affiliation Toshiba Corporate (Toshiba)
2nd Author's Name Yoshimasa Egashira  
2nd Author's Affiliation Toshiba Corporate (Toshiba)
3rd Author's Name Yoriko Utsunomiya  
3rd Author's Affiliation Toshiba Corporate (Toshiba)
4th Author's Name Daisuke Takeda  
4th Author's Affiliation Toshiba Corporate (Toshiba)
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Speaker Author-1 
Date Time 2009-07-29 13:00:00 
Presentation Time 150 minutes 
Registration for SR 
Paper # SR2009-33 
Volume (vol) vol.109 
Number (no) no.155 
Page pp.69-75 
Date of Issue 2009-07-22 (SR) 

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