Ubiquitous computing has become an integral part of the modern communication system. Wireless Sensor Networks (WSNs) are networks of small devices called sensors deployed in a geographical area to sense some physical entity. The sensed information will be then conveyed to the central entity called the Base Station (BS). WSN nodes being generally deployed in harsh environments, recharging or rep...

We consider a distributed source coding problem of L correlated Gaussian observations Yi, i = 1, 2, · · · , L. We assume that the random vector Y L = t(Y1, Y2, · · · , YL) is an observation of the Gaussian random vector X = t(X1, X2, · · · , XK), having the form Y L = AX +N , where A is a L×K matrix and N = t(N1, N2, · · · , NL) is a vector of L independent Gaussian random variables also indepe...

In this paper we propose a reduced-reference quality assessment algorithm which computes an approximation of the structural similarity (SSIM) metric exploiting coding tools provided by the distributed source coding theory. The algorithm has been tested to evaluate the quality of decoded video bitstreams after transmission over error-prone networks. We evaluate the accuracy of the proposed quali...

In this article, a two-description distributed video coding (2D-DVC) is proposed to address the robust video transmission of low-power capturers. The odd/even frame-splitting partitions a video into two sub-sequences to produce two descriptions. Each description consists of two parts, where part 1 is a zero-motion based H.264-coded bitstream of a sub-sequence and part 2 is a Wyner-Ziv (WZ)-code...

Non-adaptive joint source network coding of correlated sources is discussed in this paper. By studying the information flow in the network, we propose quantized network coding as an alternative for packet forwarding. This technique has both network coding and distributed source coding advantages, simultaneously. Quantized network coding is a combination of random linear network coding in the (i...

– An MN-Gallager Code over Galois fields, q, based on the Dynamical Block Posterior probabilities (DBP) for messages with a given set of autocorrelations is presented with the following main results: a) for a binary symmetric channel the threshold, fc, is extrapolated for infinite messages using the scaling relation for the median convergence time, tmed ∝ 1/(fc− f); b) a degradation in the thre...

Correlated data gathering in body area networks calls for systems that perform efficient compression and reliable transmission of the measurements, while imposing a small computational burden at the sensors. Highly-efficient compression mechanisms, e.g., adaptive arithmetic entropy encoding, do not address the problem adequately, as they have high computational demands. In this paper, we propos...

Multi-hop relay channels use multiple relay stages, each with multiple relay nodes, to facilitate communication between a source and destination. Previously, distributed space-time coding was used to maximize diversity gain. Assuming a low-rate feedback link from the destination to each relay stage and the source, this paper proposes end-to-end antenna selection strategies as an alternative to ...

Distributed channel coding and network coding techniques are means employed to improve the performance of cooperative transmissions. This paper studies the BLER performance provided by a cooperative scheme that combines distributed channel coding and network coding for multiple sourcemultiple relay architectures, within which the number of available relays is smaller than the number of sources....