Frame Synchronization based on Robust Header Recovery and Bayesian Testing

Usman Ali (1) , Michel Kieffer (1, 2) , Pierre Duhamel (1)

1 L2S - Laboratoire des signaux et systèmes
2 LTCI - Laboratoire Traitement et Communication de l'Information

Video transmission on wireless links usually requires some frame aggregation, so that the overhead due to the headers is not a too large percentage of the bit-stream. In such a situation, header error detection is essential, because any error in the header may cause a loss of several consecutive frames. The contributions of this paper are (i) an improved reception of the length field of the header and (ii) an improved Frame Synchronization (FS) algorithm for aggregated frames. The FS algorithm has the following characteristics: (i) it makes use of the implicit redundancies which are present in the headers, thus resulting in an efficient synchronization of the variable-length frames; (ii) Bayesian hypothesis testing is used to estimate the correct synchronization; (iii) the proposed algorithm performs estimation on-the-fly and does not require reading the whole bit-stream. A comparative performance evaluation with respect to previously proposed algorithms is provided in the context of WiMAX MAC.

Domaines: Traitement du signal et de l'image [eess.SP]; Réseaux et télécommunications [cs.NI]; Traitement du signal et de l'image [eess.SP]

Usman Ali, Michel Kieffer, Pierre Duhamel. Frame Synchronization based on Robust Header Recovery and Bayesian Testing. IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Sep 2010, Istambul, Turkey. pp.6. ⟨hal-00549251⟩