54 citations · 110 across the 7 of their papers we have counts for
5 papers · 1 filter
Minimizing the Installation Cost of Ground Stations in Satellite Networks: Complexity, Dynamic Programming and Approximation Algorithm
Christos N. Efrem, Athanasios D. Panagopoulos
In this letter, we study the optimum selection of ground stations (GSs) in RF/optical satellite networks (SatNets) in order to minimize the overall installation cost under an outag…
On the Computation and Approximation of Outage Probability in Satellite Networks with Smart Gateway Diversity
Christos N. Efrem, Athanasios D. Panagopoulos
The utilization of extremely high frequency (EHF) bands can achieve very high throughput in satellite networks (SatNets). Nevertheless, the severe rain attenuation at EHF bands imp…
Dynamic Energy-Efficient Power Allocation in Multibeam Satellite Systems
Christos N. Efrem, Athanasios D. Panagopoulos
Power consumption is a major limitation in the downlink of multibeam satellite systems, since it has a significant impact on the mass and lifetime of the satellite. In this context…
Globally Optimal Selection of Ground Stations in Satellite Systems with Site Diversity
Christos N. Efrem, Athanasios D. Panagopoulos
The availability of satellite communication systems is extremely limited by atmospheric impairments, such as rain (for radio frequencies) and cloud coverage (for optical frequencie…
A Framework for Weighted-Sum Energy Efficiency Maximization in Wireless Networks
Christos N. Efrem, Athanasios D. Panagopoulos
Weighted-sum energy efficiency (WSEE) is a key performance metric in heterogeneous networks, where the nodes may have different energy efficiency (EE) requirements. Nevertheless, W…