Browsing Faculty of Engineering by Author "(ORCID 0000-0001-5945-0813 & YÖK ID 124615) Uysal, Murat"
Now showing items 261-280 of 349
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Performance characterization of vertical underwater VLC links in the presence of turbulence
Elamassie, Mohammed; Uysal, Murat (IEEE, 2018-09-24)In this paper, we investigate the performance of vertical underwater visible light communication (VLC) links. In vertical links, water properties such as temperature and salinity change with the depth. This leads to changes ... -
Performance evaluation of LOS and NLOS vertical inhomogeneous links in underwater visible light communications
Anous, N.; Abdallah, M.; Uysal, Murat (IEEE, 2018-03-22)In this paper, underwater visible light communication (UWVLC) vertical links are modeled and evaluated, taking account of the inhomogeneous nature of underwater (UW) environment. An equivalent simplified model of stratified ... -
Performance evaluation of multiple-bit delay detection with majority vote decision rule in optical DPSK systems
Arbab, V. R.; Rad, M. M. M.; Uysal, Murat; Saghari, P. (IEEE, 2011)In this paper, the performance of multiple-bit delay detection (MBDD) systems in optical differential phase shift keying (DPSK) is investigated. Assuming that the dominant noise in the system is originated by the optical ... -
Performance evaluation of vehicle-to-vehicle visible light communications in the presence of denial of service attacks
Marin-Garcia, I.; Miramirkhani, Farshad; Uysal, Murat; Perez-Jimenez, R. (IEEE, 2019-06)Visible Light Communication (VLC) has been proposed as an efficient vehicle-to-vehicle (VLC) connectivity solution for Intelligent Transportation Systems. By using the preexisting hardware in vehicles (headlights and ... -
Performance investigation of streetlight-to-vehicle visible light communication
Eldeeb, Hossıen Badr; Elamassie, Mohammed; Muhaidat, S.; Uysal, Murat; Ho, T. D. (IEEE, 2023)This paper investigates streetlight-to-vehicle visible light communication (VLC) system performance for outdoor broadcasting applications. We adopt streetlight lamps as optical internet-of-thing (IoT) devices broadcasting ... -
Performance of coherent differential phase-shift keying free-space optical communication systems in M-distributed turbulence
Samimi, H.; Uysal, Murat (IEEE, 2013-07)In this paper, we investigate the error rate performance of a coherent free-space optical communication system with differential phase-shift keying over M-distributed turbulence channels. In our derivations, we express the ... -
Performance of cooperative amplify-and-forward protocols in vehicular ad-hoc networks
Tirkan, Z.; Shirkhani, M.; Taherpour, A.; Uysal, Murat (IEEE, 2012)Cooperative diversity is a technique where the diversity associated with spatially distributed users is exploited to overcome violent fading in wireless channels. In vehicle-to-vehicle (V2V) communication systems, where ... -
Performance of eU-OFDM based relay-assisted visible light communications
Djengomemgoto, Gerard; Narmanlioglu, Omer; Uysal, Murat (IEEE, 2016)In this paper, we consider relay-assisted visible light communication (VLC) system where intermediate light source cooperates with main light source. Following IEEE 802.15.7r VLC reference channel model, we assume presence ... -
Performance of MIMO enhanced unipolar OFDM with realistic indoor visible light channel models
Yesilkaya, A.; Miramirkhani, Farshad; Basar, E.; Panayirci, E.; Uysal, Murat (IEEE, 2016)Visible light communication (VLC) involves the dual use of illumination infrastructure for high speed wireless access. Designing such optical based communication systems, realistic indoor optical channel modeling becomes ... -
Performance of MIMO enhanced unipolar OFDM with realistic indoor visible light channel models
Yesilkaya, A.; Miramirkhani, Farshad; Basar, E.; Panayirci, E.; Uysal, Murat (IEEE, 2016)Visible light communication (VLC) involves the dual use of illumination infrastructure for high speed wireless access. Designing such optical based communication systems, realistic indoor optical channel modeling becomes ... -
Performance of multicarrier cooperative communication systems over underwater acoustic channels
Al-Dharrab, S.; Muqaibel, A.; Uysal, Murat (IET Communications, 2017)Multicarrier transmission in the form of orthogonal frequency division multiplexing (OFDM) is an efficient method to handle inter-symbol interference resulting from the frequency selectivity of the underwater acoustic (UWA) ... -
Performance of multiuser scheduling in free space optical systems over atmospheric turbulence channels
Zhalehpour, Sasan; Uysal, Murat (IEEE, 2015-10)In this study, the authors consider a multiuser multiple-input multiple-output (MU-MIMO) free space optical (FSO) communication system and investigate the performance of various scheduling protocols which provide different ... -
Performance of OFDM-based adaptive visible light communications
Narmanlıoğlu, Ömer; Kızılırmak, R. C.; Uysal, Murat (IEEE, 2017)In this paper, we investigate the performance of a direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) based adaptive transmission in the context of visible light communication (VLC). We ... -
PHY layer performance evaluation of the IEEE 802.15.7 visible light communication standard
Sarbazi, Elham; Uysal, Murat (IEEE, 2013)The IEEE 802.15.7 standard defines a PHY layer and medium access control (MAC) layer for visible light communication and promises data rates sufficient to support audio and video multimedia services. In this paper, we first ... -
Physical layer implementation of standard compliant vehicular VLC
Turan, B.; Narmanlioglu, Omer; Coleri Ergen, S.; Uysal, Murat (IEEE, 2017)Visible light communication (VLC) has recently gained popularity as a complementary technology to radio frequency (RF) based alternatives for vehicular communications as a low-cost, secure and RF interference free technology. ... -
Pilot-aided channel estimation for RIS-assisted wireless systems over time-varying fading channels
Azizzadeh, Maryam; Elamassie, Mohammed; Uysal, Murat (IEEE, 2023)Reconfigurable intelligent surfaces (RISs) have emerged as a promising technology for improving wireless communication system performance. RISs can adjust signals' phase and amplitude, resulting in improved signal strength. ... -
Pilot-aided channel estimation on SC-PAM based visible light communications
Narmanlıoğlu, Ömer; Turan, B.; Kizilirmak, R. Ç.; Ergen, S. C.; Uysal, Murat (IEEE, 2018-07-02)Estimation of the time-varying optical wireless channel response is crucial in order to decode received signals coherently. In this work, we investigate symbol-error-rate and mean absolute error performance of different ... -
Poster: on-board camera video transmission over vehicular VLC
Narmanlioglu, Omer; Turan, B.; Kebapci, Burak; Coleri Ergen, S.; Uysal, Murat (IEEE, 2017)Vehicular connectivity is envisaged to extend vehicle on-board camera videos to the nearby vehicles in order to increase drivers' road awareness. This paper demonstrates the possibilities of video transmission captured by ... -
Practical implementation and performance study of a hard-switched hybrid FSO/RF link under controlled fog environment
Lee, I. E.; Ghassemlooy, Z.; Ng, W. P.; Gourdel, V.; Khalighi, M. A.; Zvanovec, S.; Uysal, Murat (IEEE, 2014)The availability and performance of terrestrial free-space optical (FSO) communication systems are heavily deterred by the fluctuating conditions of the atmospheric channel, particularly in the presence of visibility-limiting ... -
Pricing for open access femtocell networks using market equilibrium and non-cooperative game
Tehrani, M. N.; Uysal, Murat (IEEE, 2012)In this paper, we address the pricing problem in open-access femtocell networks. We use economic and game theoretic approaches such as market equilibrium and non-cooperative game to propose novel pricing schemes. In our ...
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