Browsing Electrical & Electronics Engineering by Author "Uysal, Murat"
Now showing items 121-140 of 351
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Fractionally spaced equalization for broadband amplify-and-forward cooperative systems
Heidarpour, M. R.; Uysal, Murat; Damen, M. O. (IEEE, 2013)In this paper, we revisit the concept of fractionally spaced equalization (FSE) for broadband single-carrier amplify-and-forward (AaF) cooperative systems. Particularly, we investigate fractionally spaced frequency domain ... -
A framework on the performance analysis of dual-hop mixed FSO-RF cooperative systems
Ashrafzadeh, B.; Soleimani-Nasab, E.; Kamandar, M.; Uysal, Murat (IEEE, 2019-07)Free space optical (FSO) communication systems provide line-of-sight wireless connectivity in the unlicensed optical spectrum and achieve higher data rates in comparison to their radio frequency (RF) counterparts. FSO ... -
Free space optical communication: An enabling backhaul technology for 6G non-terrestrial networks
Elamassie, Mohammed; Uysal, Murat (MDPI, 2023-11)The deployment of non-terrestrial networks (NTNs) is envisioned to achieve global coverage for 6G and beyond. In addition to space nodes, aerial NTN nodes such as high-altitude platform stations (HAPSs) and rotary-wing ... -
FSO link attenuation measurement in extreme winter conditions for secure 5G applications
Khamidullin, A.; Kizilirmak, R. Ç.; Uysal, Murat; Ukaegbu, I. A. (SPIE, 2023)The functionality of Free Space Optical (FSO) communication links is highly influenced by meteorological conditions such as precipitation, snowfall, and fog. In this study, we establish an FSO link and conduct experimental ... -
FSO-based backhauling for airborne THz base stations
Elamassie, Mohammed; Edemen, Çağatay; Uysal, Murat (IEEE, 2023)Airborne nodes in the form of high-altitude platform stations (HAPSs) or unmanned aerial vehicles (UAVs) can be used for backhauling and wireless access. In this paper, we investigate the cascaded free space optical ... -
Gamma-gamma türbülans kanallarında tüm-optik rölelemeli FSO sistemleri için röle seçimi
Mostaani, Zohreh; Uysal, Murat (IEEE, 2014)Bu bildiride, tüm-optiksel çoklu-röle kablosuz optik haberleşme sistemleri için Gamma-Gamma atmosferik türbülans kanalı varsayımı altında servis dışı kalma başarımı incelenmiştir. Röleler arası katı senkronizasyon ihtiyacından ... -
Generalized LED index modulation optical OFDM for MIMO visible light communications systems
Başar, E.; Panayirci, E.; Uysal, Murat; Haas, Harald (IEEE, 2016)In this paper, we propose a generalized light emitting diode (LED) index modulation scheme for multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) visible light communications (VLC) systems. ... -
Generalized maximum-likelihood sequence detection for photon-counting free space optical systems
Chatzidiamantis, N. D.; Karagiannidis, G. K.; Uysal, Murat (IEEE, 2010-12)We investigate detection methods for on-off keying (OOK) photon-counting Free Space Optical (FSO) systems in the presence of turbulence-induced fading, assuming no channel state information at the receiver. To recover the ... -
Generalized performance analysis of mixed RF/FSO cooperative systems
Soleimani-Nasab, E.; Uysal, Murat (IEEE, 2016-01)Free space optical (FSO) links provide an efficient point-to-point wireless transmission solution. They are particularly useful for filling the connectivity gap between the radio frequency (RF) access network and the fiber ... -
Generalized performance analysis of mixed RF/FSO systems
Soleimani-Nasab, E.; Uysal, Murat (IEEE, 2014)We investigate the performance of dual-hop fixed-gain amplify-and-forward relaying systems over Nakagami-m and double generalized Gamma fading channels with pointing error for mixed radio frequency/free space optical ... -
Görünür ışık kanalların modellenmesi ve ACO-OFDM için başarım analizi
Yeşilkaya, A.; Alsan, H. F.; Miramirkhani, Farshad; Panayırcı, E.; Şenol, H.; Uysal, Murat (IEEE, 2015)Spectrum scarcity of traditional radio communication has led communication engineers to find new alternatives. Indoor visible light communication is one alternative to solve this problem since its spectrum is not regulated ... -
Guest editorial: Optical wireless communications
Arnon, S.; Uysal, Murat; Ghassemlooy, Z.; Xu, Z.; Cheng, J. (IEEE, 2015-09)Optical wireless communication (OWC) systems provide many advantages over radio frequency (RF) wireless technologies in some scenarios, including significantly higher data rates and a large amount of available license-free ... -
Handover in VLC networks with coordinated multipoint transmission
Demir, Muhammet Selim; Miramirkhani, Farshad; Uysal, Murat (IEEE, 2018-01-31)In this work, we consider a cellular visible light communication (VLC) network where each ceiling luminary serves as an access point (AP). The network is assumed to support coordinated multipoint transmission (CoMP). The ... -
High-rate distributed space-time-frequency coding for wireless cooperative networks
Wu, J.; Hu, H.; Uysal, Murat (IEEE, 2011-02)In this paper, we propose high-rate distributed space-time-frequency codes (DSTFCs) to exploit maximum achievable diversity gains over frequency-selective fading channels. The proposed designs achieve full-rate for any ... -
Hybrid LiFi/MMW wireless communication system with adaptive vertical handover capability
Narmanlıoğlu, Ömer; Edemen, Çağatay; Ciftci, S.; Kurtoglu, S. B.; Uysal, Murat (IEEE, 2020-10-05)Millimeter wave (MMW) communication was proposed as a high-bandwidth wireless access solution to cope with the increasing user demand for mobile data and has been already standardized in 5G networks. As another highcapacity ... -
Hybrid RF/VLC systems: A comprehensive survey on network topologies, performance analyses, applications, and future directions
Abuella, H.; Elamassie, Mohammed; Uysal, Murat; Xu, Z.; Serpedin, E.; Qaraqe, K. A.; Ekin, S. (IEEE, 2021)Wireless communications refer to data transmissions in unguided propagation media through the use of wireless carriers such as radio frequency (RF) and visible light (VL) waves. The rising demand for high data rates, ... -
IEEE 802.11bb reference channel models for indoor environments
Uysal, Murat; Miramirkhani, Farshad; Baykas, T.; Qaraqe, K. (2018-09-10)This contribution proposes 802.11bb reference channel models for indoor environments. -
IEEE 802.11BB reference channel models for light communications
Miramirkhani, F.; Baykas, T.; Elamassie, Mohammed; Uysal, Murat (IEEE, 2023-12-01)Increasing industrial attention to visible light communications (VLC) technology led the IEEE 802.11 to establish the task group 802.11bb 'Light Communications' (LC) for the development of a VLC standard. As a part of the ... -
IEEE 802.15.13-compliant visible light communications in vehicular networks
Turan, B.; Narmanlıoğlu, Ömer; Uysal, Murat (Taylor & Francis, 2018-01)Current research activities and standardization efforts in intelligent transportation systems (ITS) have mainly focused around the deployment of radio frequency (RF)-based communication techniques for vehicular networking. ... -
IEEE 802.15.7: Visible light communication standard
Uysal, Murat; Edemen, Çağatay; Baykaş, T.; Sarbazi, E.; Shams, P.; Uğurdağ, Hasan Fatih; Celebi, H. (Taylor & Francis, 2017-01-01)Visible light communications (VLC) use the visible spectrum (wavelengths of 390-750 nm or frequency band of 400-790 THz) and provide wireless communication using omnipresent light-emitting diodes (LEDs). Since the human ...
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