119 citations · 147 across the 11 of their papers we have counts for
11 papers
Capacity and Algorithms for a Cognitive Network with Primary-Secondary User Cooperation
Athanasios Papadopoulos, Nestor D. Chatzidiamantis, Leonidas Georgiadis
In this work, we examine cognitive radio networks, where secondary users may act as relays for messages sent by the primary user, hence offering performance improvement of primary…
Network Coding Techniques in Cooperative Cognitive Networks
Athanasios Papadopoulos, Nestor D. Chatzidiamantis, Leonidas Georgiadis
In this paper, we investigate transmission techniques for a fundamental cooperative cognitive radio network, i.e., a radio system where a Secondary user may act as relay for messag…
On the Efficiency of Sharing Economy Networks
Leonidas Georgiadis, George Iosifidis, Leandros Tassiulas
We consider a sharing economy network where agents embedded in a graph share their resources. This is a fundamental model that abstracts numerous emerging applications of collabora…
Exchange of Services in Networks: Competition, Cooperation, and Fairness
Leonidas Georgiadis, George Iosifidis, Leandros Tassiulas
Exchange of services and resources in, or over, networks is attracting nowadays renewed interest. However, despite the broad applicability and the extensive study of such models, e…
Multiuser Broadcast Erasure Channel with Feedback and Side Information, and Related Index Coding Results
A. Papadopoulos, L. Georgiadis
We consider the N-user broadcast erasure channel with public feedback and side information. Before the beginning of transmission, each receiver knows a function of the messages of…
Message-Passing Algorithms for Optimal Utilization of Cognitive Radio Networks
Hamed Mahmoudi, Georgios Rodolakis, Leonidas Georgiadis +1
Cognitive Radio has been proposed as a key technology to significantly improve spectrum usage in wireless networks by enabling unlicensed users to access unused resource. We presen…