Antoni Morell

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In this paper, we consider a cooperative system based on relay selection in a scenario where the available channel state information (CSI) is subject to delays. In order to exploit the selection diversity gains of the system while providing robustness against CSI inaccuracy, we propose a robust relay selection strategy based on a minimum mean square error(More)
We analyze the existing trade-offs in terms of system performance versus fairness of a cooperative system based on opportunistic relay selection (ORS) and with outdated channel state information (CSI). In particular, system performance is analytically evaluated in terms of outage probability, and the fairness behavior is assessed based on the power(More)
In this paper, a novel cross-layer framework for optimizing the dynamic bandwidth allocation (DBA) of a digital video broadcast (DVB)-return channel satellite (RCS) system using adaptive coding is proposed. The design of the medium access control (MAC) methods taking into account the adaptive physical layer and higher layers’ quality of service (QoS)(More)
In this paper, we study a novel compressed sensing technique applied to wireless sensor networks with a star topology. In particular, we propose a amplify-and-forward transmission scheme to achieve a distributed compressed sensing framework. The key idea is twofold; the first is to take advantage of time correlation properties present in most of the(More)
In this paper, we assess the physical-layer secrecy performance of the amplify-and-forward compressed sensing (AF-CS) framework when malicious eavesdropping nodes are listening. In particular, we investigate the robustness of the AF-CS scheme in the presence of a group of coordinated eavesdropping nodes under the assumption that they have corrupted channel(More)
This paper introduces a novel operational framework for the problem of time slot assignment in a Digital Video Broadcast-Return Channel via Satellite (DVB-RCS) system. The approach is compliant with the latest technical specifications emitted by the European Telecommunications Standards Institute (ETSI) about Quality of Service (QoS) in Satellite Earth(More)
An open issue still to be addressed in low-power lossy networks (LLNs) is how the application requirements, the available transport services, the network layer routes, and the data link-layer resources are mapped efficiently. This can be explained by the fact that, in most LLNs, link-layer resources cannot be easily managed; this results in a best effort IP(More)
As Wireless Sensor Networks are being adopted by industry and agriculture for large-scale and unattended deployments, the need for reliable and energy-conservative protocols become critical. Physical and Link layer efforts for energy conservation are not mostly considered by routing protocols that put their efforts on maintaining reliability and throughput.(More)
The work presents the development of a navigation system based on wireless sensor networks specially designed for elderly care applications. The main constraints of the application scenario are analysed and the tracking algorithm is designed following the application constraints. The tracking is done by the fusion of RSSI measurements using the weighted(More)