Search Results for author: Ibrahim Altunbas

Found 8 papers, 0 papers with code

On the Performance of UAV Relaying with Reconfigurable Antenna and Media Based Modulation in the Presence of Shadowed Fading

no code implementations9 Jun 2022 Ayse Betul Buyuksar, Eylem Erdogan, Ibrahim Altunbas

The results have shown that RAs can make the overall system more resilient to shadowing and fading effects in terms of error performance, and they are energy efficient.

Cooperation in Space: HAPS-Aided Optical Inter-Satellite Connectivity with Opportunistic Scheduling

no code implementations28 Dec 2021 Eylem Erdogan, Ibrahim Altunbas, Gunes Karabulut Kurt, Halim Yanikomeroglu

Issues with tracking, precision pointing, and Doppler shift are the major sources of performance loss in laser inter-satellite communication that can severely decrease the coverage and overall performance of satellite constellations.

Position Scheduling

Optical Satellite Eavesdropping

no code implementations9 Dec 2021 Olfa Ben Yahia, Eylem Erdogan, Gunes Karabulut Kurt, Ibrahim Altunbas, Halim Yanikomeroglu

In recent years, satellite communication (SatCom) systems have been widely used for navigation, broadcasting application, disaster recovery, weather sensing, and even spying on the Earth.

HAPS Selection for Hybrid RF/FSO Satellite Networks

no code implementations27 Jul 2021 Olfa Ben Yahia, Eylem Erdogan, Gunes Karabulut Kurt, Ibrahim Altunbas, Halim Yanikomeroglu

In the first phase of transmission, the satellite selects the HAPS node that provides the highest signal-to-noise ratio (SNR).

A Weather-Dependent Hybrid RF/FSO Satellite Communication for Improved Power Efficiency

no code implementations30 Jun 2021 Olfa Ben Yahia, Eylem Erdogan, Gunes Karabulut Kurt, Ibrahim Altunbas, Halim Yanikomeroglu

In SatCom, radio-frequency (RF) or free-space optical (FSO) communications can be used depending on the communication environment.

Site Diversity in Downlink Optical Satellite Networks Through Ground Station Selection

no code implementations5 Oct 2020 Eylem Erdogan, Ibrahim Altunbas, Gunes Kurt, Michel Bellemare, Guillaume Lamontagne, Halim Yanikomeroglu

Recent advances have shown that satellite communication (SatCom) will be an important enabler for next generation terrestrial networks as it can provide numerous advantages, including global coverage, high speed connectivity, reliability, and instant deployment.

Low Complexity Adaptation for Reconfigurable Intelligent Surface-Based MIMO Systems

no code implementations5 Jun 2020 Zehra Yigit, Ertugrul Basar, Ibrahim Altunbas

Reconfigurable intelligent surface (RIS)-based transmission technology offers a promising solution to enhance wireless communication performance cost-effectively through properly adjusting the parameters of a large number of passive reflecting elements.

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