Being initially proposed for a Binary Symmetric Channel, we adapt in this paper a blind frame synchronization method to a Gaussian channel. This new method is based on the computation of the Logarithmic Likelihood Ratio (LLR) of the syndromes elements. A comparison between the performance of these two methods is done by synchronizing some Low Density Parity Check (LDPC) codes and Convolutional codes. The simulated results are also compared to the theoretical ones by finding the probabilities of false synchronization for the two methods. The theoretical results may help us to define a synchronization threshold so that the calculation time can be decreased.
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