Guillaume Sicot

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Interleaving is a key component of many digital communication systems involving error correction schemes. It provides a form of time diversity to guard against bursts of errors. Recently, interleavers have become an evenmore integral part of the code design itself, if we consider for example turbo and turbo-like codes. In a non-cooperative context, such as(More)
In this paper we present a generic approach for the problem of the blind estimation of the parameters of linear and convolutional error correcting codes. In a non-cooperative context, an adversary has only access to the noised transmission he has intercepted. The intercepter has no knowledge about the parameters used by the legal users. So, before having(More)
We propose a technique, based on a fuzzy hidden Markov chain (HMC) model, for the unsupervised segmentation of images. Our main contribution is to use Dirac and Lebesgue measures simultaneously at the class chain level. This model allows the coexistence of hard and fuzzy pixels in the same picture. The fuzzy approach enriches the classical model by adding a(More)
In decentralized communication schemes such as ad-hoc networks, a major challenge concerns the synchronization and detection of users sending information simultaneously. Classical synchronisation techniques based on training sequences decrease dramatically the spectral efficiency and are rarely applicable in non-cooperative settings. In this contribution,(More)
Canal coding can not nowadays be by passed. In order to decode the coded sequence, the receptor has to find the beginning of the codewords. This problem is usually solved by adding periodically to the transmit sequence a frame synchronization sequence. Of course the longer the sequence the better the synchronization but the less the spectral efficiency. We(More)
The genetic code is a key concept in genetics. This code establishes the link between the DNA (desoxyribonucleic acid), composed of nucleic acids, and proteins, composed of amino acids. The genetic code is known to be universal, indeed almost all organisms use this code, and it is degenerated, this means that several sequences of nucleic acids can be(More)
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