Christos N. Efrem

According to our database, Christos N. Efrem authored at least 20 papers between 2018 and 2024.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2024

Robust IRS-Element Activation for Energy Efficiency Optimization in IRS-Assisted Communication Systems With Imperfect CSI.

Christos N. Efrem, Ioannis Krikidis

IEEE Trans. Wirel. Commun., October, 2024

Transmit and Receive Antenna Port Selection for Channel Capacity Maximization in Fluid-MIMO Systems.

Christos N. Efrem, Ioannis Krikidis

CoRR, 2024

2023

Joint IRS Location and Size Optimization in Multi-IRS Aided Two-Way Full-Duplex Communication Systems.

Christos N. Efrem, Ioannis Krikidis

IEEE Trans. Wirel. Commun., October, 2023

Recurrence relations for the joint distribution of the sum and maximum of independent random variables.

Christos N. Efrem

CoRR, 2023

Global Optimization of Energy Efficiency in IRS-Aided Communication Systems via Robust IRS-Element Activation.

Christos N. Efrem, Ioannis Krikidis

Proceedings of the IEEE International Conference on Communications, 2023

2022

Capacity Allocation Mechanisms in High-Throughput Satellite Systems: One-to-Many Pairings.

Anargyros J. Roumeliotis, Christos N. Efrem, Charilaos I. Kourogiorgas, Athanasios D. Panagopoulos

IEEE Syst. J., 2022

Minimization of nth Order Rate Matching in Satellite Networks with One to Many Pairings.

Anargyros J. Roumeliotis, Christos N. Efrem, Athanasios D. Panagopoulos

Future Internet, 2022

IRS Deployment Optimization in Multi-IRS Assisted Two-Way Full-Duplex Communication Systems.

Christos N. Efrem, Ioannis Krikidis

Proceedings of the IEEE International Conference on Communications, 2022

2021

Optimization algorithm design and performance analysis for next-generation wireless networks

Christos N. Efrem

PhD thesis, 2021

Minimization of Losses and Rate Matching in Satellite Networks With One to Many Pairings.

Anargyros J. Roumeliotis, Christos N. Efrem, Charilaos I. Kourogiorgas, Athanasios D. Panagopoulos

IEEE Wirel. Commun. Lett., 2021

Minimizing the Installation Cost of Ground Stations in Satellite Networks: Complexity, Dynamic Programming and Approximation Algorithm.

Christos N. Efrem, Athanasios D. Panagopoulos

IEEE Wirel. Commun. Lett., 2021

On the Computation and Approximation of Outage Probability in Satellite Networks With Smart Gateway Diversity.

Christos N. Efrem, Athanasios D. Panagopoulos

IEEE Trans. Aerosp. Electron. Syst., 2021

2020

Globally Optimal Selection of Ground Stations in Satellite Systems With Site Diversity.

Christos N. Efrem, Athanasios D. Panagopoulos

IEEE Wirel. Commun. Lett., 2020

Dynamic Energy-Efficient Power Allocation in Multibeam Satellite Systems.

Christos N. Efrem, Athanasios D. Panagopoulos

IEEE Wirel. Commun. Lett., 2020

Optimizing the Ground Network of Optical MEO Satellite Communication Systems.

Nikolaos K. Lyras, Christos N. Efrem, Charilaos I. Kourogiorgas, Athanasios D. Panagopoulos, Pantelis-Daniel M. Arapoglou

IEEE Syst. J., 2020

2019

Energy Efficiency Optimization: A New Trade-Off Between Fairness and Total System Performance.

Christos N. Efrem, Athanasios D. Panagopoulos

IEEE Wirel. Commun. Lett., 2019

A Framework for Weighted-Sum Energy Efficiency Maximization in Wireless Networks.

Christos N. Efrem, Athanasios D. Panagopoulos

IEEE Wirel. Commun. Lett., 2019

Medium earth orbit optical satellite communication networks: Ground terminals selection optimization based on the cloud-free line-of-sight statistics.

Nikolaos K. Lyras, Christos N. Efrem, Charilaos I. Kourogiorgas, Athanasios D. Panagopoulos

Int. J. Satell. Commun. Netw., 2019

2018

Optimum Monthly Based Selection of Ground Stations for Optical Satellite Networks.

Nikolaos K. Lyras, Christos N. Efrem, Charilaos I. Kourogiorgas, Athanasios D. Panagopoulos

IEEE Commun. Lett., 2018

Joint Power Allocation and Transmission Time Selection in Duty-cycled Wireless Sensor Networks.

Christos N. Efrem, Athanasios D. Panagopoulos

Proceedings of the 2018 Global Information Infrastructure and Networking Symposium, 2018