In this paper we investigate iterative source-channel decoding for robust JPEG coded images transmission over noisy channels. Huffman codes used as the variable-length coding scheme in JPEG coding can be represented by an irregular trellis structure proposed by Balakirsky (1997). State transition probabilities can be derived from the irregular trellis and can be used as a priori information to ...

We study the transport properties of multiterminal graphene nanodevices using the Landauer-Buttiker approach and the tight binding model. We consider a four-terminal device made at the crossing of a zigzag and armchair nanoribbons and two types of T-junction devices. The transport properties of graphene multiterminal devices are highly sensitive to the details of the junction region. Thus the p...

Fix a random variable X having as its possible values entries of a set X . Let Σ∗ denote the set of strings whose characters are taken from an alphabet Σ. In the case Σ has two elements, we can interpret elements of Σ∗ as bit strings, for example. Let Y denote a set of target symbols and C denote a code, a function of the form X → Y∗. The extension of a symbol code, a code of the form C : X → Y...