Title :
Pre-FFT adaptive beamformer based on RLS for OFDM systems
Author :
Fan, Ling-Yan ; He, Chen ; Che, Xiao-Lin
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiao Tong Univ., China
Abstract :
In this paper, a pre-fast Fourier transformation (FFT) adaptive beamformer based on RLS is proposed for orthogonal frequency division multiplexing (OFDM) systems, using pilot symbols in the frequency domain. The simulation results show that the proposed beamformer has good convergence performance while reducing computational complexity, and can obtain robust BER performance due to tracking the variance of the channel by the pilot signal.
Keywords :
OFDM modulation; array signal processing; convergence of numerical methods; error statistics; fast Fourier transforms; least squares approximations; recursive estimation; time-varying channels; OFDM systems; RLS; convergence performance; fast Fourier transformation; orthogonal frequency division multiplexing; pilot symbols; pre-FFT adaptive beamformer; reduced computational complexity; robust BER performance; time varying channel; Computational complexity; Computational modeling; Convergence; Frequency domain analysis; Helium; Least squares approximation; Linear antenna arrays; OFDM; Resonance light scattering; Robustness;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552238
