DocumentCode :
2575958
Title :
A smart antenna with pre- and post-FFT hybrid domain beamforming for broadband OFDM system
Author :
Matsuoka, Hidehiro ; Kasami, Hideo ; Tsuruta, Makoto ; Shoki, Hiroki
Author_Institution :
Corp. Res. & Dev. Center, Toshiba Corp., Kawasaki
Volume :
4
fYear :
2006
fDate :
3-6 April 2006
Firstpage :
1916
Lastpage :
1920
Abstract :
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
Keywords :
OFDM modulation; adaptive antenna arrays; broadband networks; diversity reception; eigenvalues and eigenfunctions; fast Fourier transforms; BER; FFT hybrid domain beamforming; SNR; broadband OFDM system; eigenanalysis; eigenbeams; maximum ratio combining; signal-to-noise ratio; smart antenna; subcarrier diversity; AWGN; Adaptive arrays; Array signal processing; Bit error rate; Broadband antennas; Diversity reception; Fading; Multipath channels; OFDM modulation; Signal to noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference, 2006. WCNC 2006. IEEE
Conference_Location :
Las Vegas, NV
ISSN :
1525-3511
Print_ISBN :
1-4244-0269-7
Electronic_ISBN :
1525-3511
Type :
conf
DOI :
10.1109/WCNC.2006.1696588
Filename :
1696588
Link To Document :
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