System for Compensating Turbodecoder Phase Shift

摘要

A turbocode receiver system of a signal emitted by a turbo-coded modulated transmitter system, includes: a soft demapper ( 1 ) the output of which is connected to a turbodecoder ( 2 ), and an adaptive locked loop including: a measurement generator ( 3 ) the input of which is connected to the turbodecoder output to receive the reliability vector (LLR_out) of the result and adapted to transform the vector into a reliability measurement (M(I)), equal to the average of the lowest reliability values of word bits, transmitted to a phase shift estimator ( 4 ) the output of which is connected to a phase compensator ( 5 ) positioned upstream of the soft demapper and adapted to correct the incoming signal of the phase value phi.