TURBO DECODER WITH DECISION FEEDBACK EQUALIZATION

摘要

A decoder (150) equalizes a turbo coded signal with intersymbol interference by performing a decision-feedback equalization in each iteration of the turbo decoding process. In each iteration process, two recursion processors (DEC1 and DEC2) calculate soft output values for the information bits and the coded bits of the signal as well. Hard output values are derived from the soft output values. A decision feedback equalizer (100) in an iterative loop (160) of the decoder receives the hard output values uses these to provide a correction for the intersymbol interference. Thereafter, the decision feedback signal applies the correction signal to the input signal to minimize the intersymbol interference.