An Improved Interleaver Identification Algorithm Based on Conformity of Parity-check Equation

In view of the low identification rate under low signal-to-noise ratio in the existing Turbo code interleaver identification algorithms, a novel identification algorithm is proposed in this paper by integrating the verification update of the information into the average conformity of the verification equation. Compared to the conventional identification algorithm, this paper re-estimates the check sequence and the input information sequence utilizing the information of the known interleaving position, so that the remaining interleaving positions can be recognized in turn after the data errors are reduced. The simulation results suggest that the proposed algorithm has a higher recognition rate than the conventional algorithm when the signal-to-noise ratio is low.