FUZZY STOCHASTIC GRADIENT DECISION-FEEDBACK EQUALIZER FOR VSB TERRESTRIAL HDTV BROADCASTING

In this paper, we present a fuzzy stochastic gradient (FSG) decision f eedback equalizer (DFE) far VSB terrestrial HDTV broadcasting. This eq ualizer employs a well-designed fuzzy Takagi-Sugeno (TS) model to auto matically regulate the step size of the descent gradient vector, combi ning fast convergence rate and low excess mean square error(MSE), The only penalty paid is a slightly increase in computational complexity c ompared with the LMS algorithm. Simulation results show that this equa lizer provides 3.5 dB signal-to-noise ratio (SNR) improvement at a BER of 3.0 x 10(-6) with respect to the conventional LMS DFE recommended by Grand Alliance.