Patent ID: 6442219
Filing Date: 2002-08-27
Classification: H04L

Abstract:
A method of simultaneous phase synchronization and decoding that makes use of maximum likelihood criterion, said method being applied to signal packets received at a receiver, received signals having been subjected to convolutional encoding at a transmitter, said method comprising calculating branch metrics taking account of firm decisions calculated on received symbols and of a magnitude that takes account of phase error between the carrier of said received signal and a local oscillator signal used in said receiver, magnitude weighting decision variables, constituted by complex digital components of said received symbols, the method being characterized in that said magnitude is equal to &Sgr;k* for each of the paths studied, where:&Sgr;k=&Sgr;n=0Nrkâˆ’nÂ·d*kâˆ’n r designating a received complex decision variable; d designating a decoding symbol; ( )* designating the complex conjugate symbol of a complex value; k designating the current decoded symbol; and N the number of symbols taken into consideration.