Patent ID: 6304616
Filing Date: 2001-10-16
Classification: H04L

Abstract:
A method of reception of a coded data signal by a receiver, said receiver including a demodulator (Dm) that generates estimated symbols (c'.sub.i) from said coded data signal and a data decoder (Dd), said data decoder being connected to the demodulator following the demodulator and the coded data signal being encoded by means of a state transition diagram, said state transition diagram including a number of states (U, V, W, X) of the data decoder (Dd), said method comprising the steps of:a) forming a number (N) of groups (a, b) from the states (U, V, W, X) of the state transition diagram;b) continuously making estimations of probabilities of group membership of a current state of the data decoder in said groups (a,b);c) furnishing said estimations of the probabilities of said group membership to the demodulator (Dm) in the form of assisting signals; andd) generating the estimated symbols (c'.sub.i) with the help of the assisting signals.