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Paper Abstract and Keywords
Presentation 2005-10-21 10:15
A pre- and post-FFT hybrid smart antenna using eigen-beamspace for OFDM systems
Hidehiro Matsuoka, Hideo Kasami, Makoto Tsuruta, Hiroki Shoki (Toshiba)
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a smart antenna with pre-FFT beamforming based on
eigenanalysis and post-FFT subcarrier diversity for broadband OFDM systems.
This method can achieve signal-to-noise ratio (SNR) enhancement due to
two independent eigenbeams in the pre-FFT domain and
maximum ratio combining in individual subcarriers in the post-FFT domain.
Two pre-FFT eigenbeams focus on the efficient combining of desired signal energy
as diversity branches
while they achieve lower computational load compared with the optimum
post-FFT diversity which consists of the same number of FFT circuits as antennas.
Computer simulation results show the complexity is reduced by 50\% while
keeping
the similar bit error rate (BER) performance to the optimum diversity in typical
cases of multipath environments.
Keyword (in Japanese) (See Japanese page) 
(in English) OFDM / smart antenna / eigenbeam / post-FFT diversity / pre-FFT beamforming / matched filter / mobile communication /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 356, RCS2005-99, pp. 85-90, Oct. 2005.
Paper # RCS2005-99 
Date of Issue 2005-10-13 (RCS) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee AP RCS  
Conference Date 2005-10-20 - 2005-10-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Akita Prefectural Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antenna, MIMO, RF Signal Processing etc. 
Paper Information
Registration To RCS 
Conference Code 2005-10-AP-RCS 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A pre- and post-FFT hybrid smart antenna using eigen-beamspace for OFDM systems 
Sub Title (in English)  
Keyword(1) OFDM  
Keyword(2) smart antenna  
Keyword(3) eigenbeam  
Keyword(4) post-FFT diversity  
Keyword(5) pre-FFT beamforming  
Keyword(6) matched filter  
Keyword(7) mobile communication  
Keyword(8)  
1st Author's Name Hidehiro Matsuoka  
1st Author's Affiliation Toshiba Corporation (Toshiba)
2nd Author's Name Hideo Kasami  
2nd Author's Affiliation Toshiba Corporation (Toshiba)
3rd Author's Name Makoto Tsuruta  
3rd Author's Affiliation Toshiba Corporation (Toshiba)
4th Author's Name Hiroki Shoki  
4th Author's Affiliation Toshiba Corporation (Toshiba)
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Speaker Author-1 
Date Time 2005-10-21 10:15:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2005-99 
Volume (vol) vol.105 
Number (no) no.356 
Page pp.85-90 
#Pages
Date of Issue 2005-10-13 (RCS) 


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