Browsing Electrical & Electronics Engineering by Author "Uysal, Murat"
Now showing items 241-260 of 351
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Outage performance of MIMO free-space optical systems in gamma-gamma fading channels
Kazemi, Hossein; Mostaani, Zohreh; Uysal, Murat; Ghassemlooy, Z. (IEEE, 2013)In this paper, we consider a MIMO Free-Space Optical (FSO) communication system over gamma-gamma turbulence channels and derive a closed-form analytical expression for the outage probability taking into account the effects ... -
Outage performance of mixed RF-FSO systems over DGG and nakagami-m channels
Ashrafzadeh, B.; Soleimani-Nasab, E.; Zaimbashi, A.; Uysal, Murat (IEEE, 2020-12)In mixed RF (radio frequency)-FSO (free space optical) systems, the FSO link is used for backhauling while RF is used for wireless access. In many practical deployment scenarios especially in urban environments, more than ... -
Outage performance of multi-hop hybrid FSO/RF communication systems
Kazemi, H.; Uysal, Murat; Touati, F.; Haas, H. (IEEE, 2015)In this paper, five scenarios are considered for the realization of a multi-hop hybrid free-space optical/radio frequency (FSO/RF) communication system with decode-and-forward (DF) relaying, and analytical outage probability ... -
Outage probability analysis of a vertical underwater wireless optical link subject to oceanic turbulence and pointing errors
Ijeh, I. C.; Khalighi, M. A.; Elamassie, Mohammed; Hranilovic, S.; Uysal, Murat (Optica Publishing Group, 2022-06-01)The reliability of an underwater wireless optical communication (UWOC) network is seriously impacted by beam misalignment between transmitters (Txs) and receivers (Rxs). Also, the performance of UWOC systems can be affected ... -
A path loss model for vehicle-to-vehicle visible light communications
Eldeeb, Hossıen Badr; Miramirkhani, F.; Uysal, Murat (IEEE, 2019)The increasing adoption of LEDs in exterior automotive lighting makes visible light communication (VLC) a natural solution for vehicular networking. In this paper, we consider a vehicle-to-vehicle link and propose a path ... -
Path selection for relay-assisted underwater visible light communication systems
Elamassie, Mohammed; Uysal, Murat (IEEE, 2022)In this paper, we consider underwater visible light communication (UVLC) system with M parallel relaying paths where each path has N decode-and-forward (DF) relays. One path (not necessarily the best one) out of M paths ... -
Performance analysis and optimization of cascaded I2V and V2V VLC links
Eldeeb, Hossien Badr Hossien; Elamassie, Mohammed; Uysal, Murat (IEEE, 2021-09-06)In smart transportation systems, the infrastructures such as traffic lights are expected to transmit different safety messages according to the receptors (i.e., vehicle, pedestrian, platoon, etc.). The focus of this study ... -
Performance analysis and optimization of unipolar OFDM based relay-assisted visible light communications☆☆
Narmanlıoğlu, Ömer; Djengomemgoto, G.; Uysal, Murat (Elsevier, 2017)In this paper, we consider a relay-assisted visible light communication (VLC) system where an intermediate light source cooperates with the main light source. Following the IEEE 802.15.7r1 VLC reference channel model, we ... -
Performance analysis of cooperative diversity networks with imperfect channel estimation
Ikki, S. S.; Amin, O.; Uysal, Murat (IEEE, 2010)In this paper, we investigate the effect of channel estimation error on the error rate performance of a multi-relay system with amplify-and-forward relaying. We consider orthogonal relaying and study both conventional ... -
Performance analysis of cooperative diversity networks with imperfect channel estimation over Rician fading channels
Ikki, S. S.; Feteiha, M.; Uysal, Murat (IEEE, 2010)In this paper, we examine the effect of channel estimation error on the error and outage probabilities of a multi-relay system with amplify-and-forward relaying over frequency-flat Rician fading channel. We consider ... -
Performance analysis of decode-and-forward multi-hop transmission for vehicular networks
Feteiha, M. F.; Uysal, Murat (IEEE, 2012)In this paper, we consider a multi-hop vehicular network in which the transmitted signal propagates through sequential vehicle hops to arrive to the destination vehicle. We assume doubly-selective channels and employ ... -
Performance analysis of decoy state quantum key distribution over underwater turbulence channels
Raouf, Amir Hossein Fahim; Safari, M.; Uysal, Murat (Optica Publishing Group, 2022-06-01)Decoy state quantum key distribution protocols have been studied for atmospheric, fiber, and satellite links; however, those results are not directly applicable to underwater environments with different channel characteristics. ... -
Performance analysis of free space optical links over turbulence and misalignment induced fading channels
Lee, I. E.; Ghassemlooy, Z.; Ng, W. P.; Uysal, Murat (IEEE, 2012)The performance of free-space optical (FSO) communication system is investigated from the information theory perspective, under the influence of atmospheric loss and channel fading due to the turbulence and pointing error. ... -
Performance analysis of MIMO free-space optical communication systems with selection combining
Kazemi, Hossein; Uysal, Murat (IEEE, 2013)In this paper, we investigate the outage performance of a multi-input multi-output (MIMO) free-space optical (FSO) communication system with selection combining (SC). Under the assumption of log-normal distributed atmospheric ... -
Performance analysis of MIMO FSO systems with radial array beams and finite sized detectors
Gökçe, M. C.; Kamacıoğlu, C.; Uysal, Murat; Baykal, Y. (SPIE, 2014)Multiple-input multiple-output (MIMO) systems are employed in free space optical (FSO) links to mitigate the degrading effects of atmospheric turbulence. In this paper, we consider a MIMO FSO system with practical transmitter ... -
Performance analysis of MIMO NLOS UV communications over atmospheric turbulence channels
Ardakani, Maryam Haghighi; Heidarpour, Ali Reza; Uysal, Murat (IEEE, 2016)Strong molecular and aerosol scattering in ultraviolet (UV) wavelengths enable the non-line-of-sight (NLOS) outdoor wireless connectivity which is attractive in many applications due to covertness and security. In the ... -
Performance analysis of MIMO NLOS UV communications over atmospheric turbulence channels
Ardakani, Maryam Haghighi; Heidarpour, Ali Reza; Uysal, Murat (IEEE, 2016)Strong molecular and aerosol scattering in ultraviolet (UV) wavelengths enable the non-line-of-sight (NLOS) outdoor wireless connectivity which is attractive in many applications due to covertness and security. In the ... -
Performance analysis of multiple-input multiple-output free-space optical systems with partially coherent Gaussian beams and finite-sized detectors
Gökçe, M. C.; Baykal, Y.; Uysal, Murat (SPIE, 2016)Multiple-input multiple-output (MIMO) techniques are employed in free-space optical (FSO) links to mitigate the degrading effects of atmospheric turbulence. We consider a MIMO FSO system, which consists of a radial laser ... -
Performance analysis of parallel relaying in free-space optical systems
Aghajanzadeh, S. M.; Uysal, Murat (IEEE, 2015-11)In this paper, we investigate the information theoretic performance of parallel relaying in free-space optical (FSO) communications over Gamma-Gamma fading channels. We consider an intensity modulation/direct-detection ... -
Performance analysis of quantum key distribution in underwater turbulence channels
Raouf, Amir Hossein Fahim; Safari, M.; Uysal, Murat (The Optical Society, 2020)The current literature on quantum key distribution is limited mainly to transmissions over fiber optic, atmospheric, or satellite links and is not directly applicable to underwater environments with different channel ...
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