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Paper Abstract and Keywords
Presentation 2005-11-17 15:00
OFDM adaptive antenna array with frequency-domain weight update and delay time-domain channel estimation
Osamu Nakamura, Shinsuke Takaoka, Eisuke Kudoh, Fumiyuki Adachi (Tohoku Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Adaptive antenna array is attractive for uplink signal transmission in mobile communication systems since it can suppress the multiaccess interference. Adaptive antenna array in OFDM systems is classified into Pre- and Post-FFT type. It is well known that the Pre-FFT type achieves faster weight convergence than Post-FFT type because Pre-FFT type can update weight at each received sampling. On the other hand, we showed that frequency-domain updating also could achieve a fast weight convergence so that it could update weight the number of subcarriers times per OFDM symbol under ideal channel estimation. However, this proposal needs channel state information for reference signal and channel estimation error may degree the BER performance. In this paper, we show by computer simulation that a fast weight convergence can be achieved and a good tracking ability against fading can be obtained using delay time-domain channel estimation.
Keyword (in Japanese) (See Japanese page) 
(in English) OFDM / adaptive antenna array / adaptive algorithm / / / / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 411, RCS2005-110, pp. 19-24, Nov. 2005.
Paper # RCS2005-110 
Date of Issue 2005-11-10 (RCS) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee RCS  
Conference Date 2005-11-17 - 2005-11-18 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To RCS 
Conference Code 2005-11-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) OFDM adaptive antenna array with frequency-domain weight update and delay time-domain channel estimation 
Sub Title (in English)  
Keyword(1) OFDM  
Keyword(2) adaptive antenna array  
Keyword(3) adaptive algorithm  
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1st Author's Name Osamu Nakamura  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Shinsuke Takaoka  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Eisuke Kudoh  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Fumiyuki Adachi  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2005-11-17 15:00:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2005-110 
Volume (vol) vol.105 
Number (no) no.411 
Page pp.19-24 
#Pages
Date of Issue 2005-11-10 (RCS) 


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