Soft Input Channel Estimation for Turbo Equalization

S. Song, A.C. Singer, K.-M. Sung
2004 IEEE Transactions on Signal Processing  
In this paper, we consider soft decision directed channel estimation for turbo equalization. To take advantage of soft information provided by the decoder, a minimum mean square error linear channel estimator is derived under an uncorrelated channel tap model, and a soft input recursive least squares algorithm is also developed by modifying the cost function of the conventional recursive least squares algorithm. The performance of the proposed channel estimators are analyzed in terms of mean
more » ... are identification error (MSIE) for stationary channels. Simulation results for both time-invariant and time-varying frequency-selective Rayleigh fading channels are also presented.
doi:10.1109/tsp.2004.834270 fatcat:cny7p3wfuzeefbkxhlshbkbgai