Browsing Electrical & Electronics Engineering by Author "Uysal, Murat"
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Editorial
Uysal, Murat; Alves, L. N.; Cheng, J.; Chenji, H.; Safari, M.; Özyeğin University; (ORCID 0000-0001-5945-0813 & YÖK ID 124615) Uysal, Murat; Uysal, Murat; 1 (2018-12)N/A -
Effect of eddy diffusivity ratio on underwater optical scintillation index
Elamassie, Mohammed; Uysal, Murat; Baykal, Y.; Abdallah, M.; Qaraqe, K. (The Optical Society, 2017-10-11)The performance of underwater optical wireless communication systems is severely affected by the turbulence that occurs due to the fluctuations in the index of refraction. Most previous studies assume a simplifying, yet ... -
Effect of fog and rain on the performance of vehicular visible light communications
Elamassie, Mohammed; Karbalayghareh, Mehdi; Miramirkhani, Farshad; Kızılırmak, R. Ç.; Uysal, Murat (IEEE, 2018-07-20)In Intelligent Transportation Systems, visible light communication (VLC) has emerged as a powerful candidate to enable wireless connectivity in vehicle-to-vehicle (V2V) and vehicle-to- infrastructure (V2I) links. While VLC ... -
Effect of LED wiring and cabling topologies on visible light communication channels
Safaraliev, Sadi; Miramirkhani, Farshad; Uysal, Murat (IEEE, 2018-01-19)Visible light communication (VLC) is an emerging short-range wireless access technology. It involves the dual use of illumination infrastructure for communication purposes and builds upon the principle of modulating light ... -
Effect of partial coherence on MISO FSO systems
Gökçe, M. C.; Baykal, Y.; Uysal, Murat (IEEE, 2015)Multiple-input single-output (MISO) techniques are employed in free space optical (FSO) systems to mitigate the degrading effects of atmospheric turbulence and therefore the link reliability is improved. In this paper, we ... -
Effect of scattering phase function on underwater visible light communication channel models
Miramirkhani, F.; Karbalayghareh, M.; Uysal, Murat (Elsevier, 2021-10)Non-sequential ray tracing simulations are commonly employed to model underwater visible light communication (VLC) channels. The accuracy of such simulations highly depends on how well the optical properties of water (i.e., ... -
Effect of sea waves on vertical underwater visible light communication links
Elamassie, Mohammed; Sait, S. M.; Uysal, Murat (IEEE, 2023-04)Underwater visible light communication (VLC) has been proposed to deal with emerging high bandwidth underwater applications. Initial research works on underwater VLC are based on the assumption that both transmitter and ... -
Effect of wiring and cabling topologies on the performance of distributed MIMO OFDM VLC systems
Narmanlıoğlu, Ömer; Kızılırmak, R. Ç.; Miramirkhani, Farshad; Safaraliev, Sadi; Sait, S. M.; Uysal, Murat (IEEE, 2019)Since most indoor spaces have multiple luminaires for illumination, for visible light communication (VLC) systems, multiple-input multiple-output (MIMO) communication emerges as a natural solution to improve the data rates ... -
Efficient resource allocation scheme for multi-user hybrid VLC/IR networks
Eldeeb, Hossıen Badr; Selmy, H. A. I.; Elsayed, H. M.; Badr, R. I.; Uysal, Murat (IEEE, 2019)An optimal fair resource allocation (OFRA) scheme is proposed to mitigate both inter-symbol and inter-user interferences in uplink multi-user VLC/IR networks. The scheme aims to improve the fairness among the users in terms ... -
Efficient resource allocation scheme in multi-user liFi networks based on angle oriented transceiver
Selmy, H. A. I.; Elsayed, H. M.; Badr, R. I.; Eldeeb, Hossıen Badr; Uysal, Murat (IEEE, 2021)In this paper, an efficient resource allocation scheme in multi-user LiFi networks is proposed using the angle oriented (AO) technology at the receiver and transmitter sides. To cope with the inter-symbol and inter-user ... -
EM-based joint time delay and channel estimation for cooperative communications
Ak, S.; Odabaşıoğlu, N.; Uysal, Murat (IEEE, 2011)In this paper, we study joint time delay and channel estimation for a cooperative communication system with amplify-and-forward (AF) relaying. The proposed joint estimator is based on Expectation-Maximization (EM) algorithm ... -
Emerging optical wireless communications-advances and challenges
Ghassemlooy, Z.; Arnon, S.; Uysal, Murat; Xu, Z.; Cheng, J. (IEEE, 2015-09)New data services and applications are emerging continuously and enhancing the mobile broadband experience. The ability to cope with these varied and sophisticated services and applications will be a key success factor for ... -
End-to-end performance of mixed RF/FSO transmission systems
Samimi, H.; Uysal, Murat (IEEE, 2013-11)In this paper, we consider a heterogenous scenario where free-space optical (FSO) and radio-frequency (RF) technologies are deployed together as a dual-hop communication system, and we investigate the end-to-end outage ... -
Energy aware trajectory optimization of solar powered AUVs for optical underwater sensor networks
Mahmoodi, Khadijeh Ali; Uysal, Murat (IEEE, 2022-12)Visible light communication (VLC) provides an alternative underwater wireless connectivity solution with its low latency and high data rates albeit at relatively shorter distances in the order of tens of meters. In the ... -
Enhanced MRC for decode-and-forward cooperative diversity systems
Nasri, A.; Schober, R.; Uysal, Murat (IEEE, 2012-10)In this letter, we propose a novel enhanced maximal-ratio combining (E-MRC) scheme for multi-branch decode-and-forward (DF) cooperative diversity systems consisting of a source, a destination, and multiple relays. This ... -
Error probability of DF relaying with pilot-assisted channel estimation over time-varying fading channels
Ikki, S. S.; Al-Dharrab, S.; Uysal, Murat (IEEE, 2012-01)In this paper, we investigate the error rate performance of a cooperative network with adaptive decode-and-forward (DF) relaying over time-selective frequency-flat Rayleigh-fading channels. We assume pilot-symbol-assisted ... -
Error-rate performance analysis of cooperative OFDMA system with decode-and-forward relaying
Fareed, M. M.; Uysal, Murat; Tsiftsis, T. A. (IEEE, 2014-06)In this paper, we investigate the performance of a cooperative orthogonal frequency-division multiple-access (OFDMA) system with decode-and-forward (DaF) relaying. Specifically, we derive a closed-form approximate ... -
eU-OFDM based multiple access for visible light communication networks
Djengomemgoto, Gerard; Narmanlıoğlu, Ömer; Kizilirmak, R. C.; Uysal, Murat (IEEE, 2017)In this paper, we propose a novel protocol for cooperative multiple access in visible light communication (VLC) networks. The proposed protocol exploits the features of enhanced unipolar orthogonal frequency division ... -
A European view on the next generation optical wireless communication standard
Jungnickel, V.; Uysal, Murat; Serafimovski, N.; Baykas, T.; O’Brien, D.; Ciaramella, E.; Ghassemlooy, Z.; Green, R.; Haas, H.; Haigh, P. A.; Gil Jimenez, V. P.; Miramirkhani, Farshad; Wolf, M.; Zvánovec, S. (IEEE, 2015)Optical wireless technology uses light for mobile communications. The idea is to simultaneously combine the illumination provided by modern high-power light-emitting diodes (LEDs) with high-speed wireless communications. ... -
Event-triggered adaptive handover for centralized hybrid VLCMMW networks
Narmanlıoğlu, Ömer; Uysal, Murat (IEEE, 2022-01)Visible light communication (VLC) builds upon the dual use of LED-based lighting infrastructure for data transmission. It is particularly attractive for user-dense environments and mainly positioned as a complementary ...
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