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This paper concerns sparse decomposition of a noisy signal into atoms which are specified by unknown continuous-valued parameters. An example could be estimation of the model order, frequencies and amplitudes of a superposition of complex sinusoids. The common approach is to reduce the continuous parameter space to a fixed grid of points, thus restricting the solution space. In this work, we avoid...
We design iterative receiver schemes for a generic communication system by treating channel estimation and information decoding as an inference problem in graphical models. We introduce a recently proposed inference framework that combines belief propagation (BP) and the mean field (MF) approximation and includes these algorithms as special cases. We also show that the expectation propagation and...
The employment of relay-nodes (RN) to assist the base station-user terminal (BS-UT) transmissions in wireless systems could lead to significantly increased performance when compared to the direct BS-UT transmissions, provided that a PER smaller than a target-PER should be ensured. Nevertheless, the performance of the cooperative BS-RN-UT link is depending on the coded-cooperation algorithm employed...
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