Browsing Electrical & Electronics Engineering by Author "Narmanlıoğlu, Ömer"
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Broadcasting brake lights with MIMO-OFDM based vehicular VLC
Turan, B.; Narmanlıoğlu, Ömer; Coleri Ergen, S.; Uysal, Murat (IEEE, 2016)Inter-vehicular connectivity to enhance road safety and enable highly autonomous driving is increasingly becoming popular. Despite the prevalent works on radio-frequency (RF) based vehicular communication schemes, visible ... -
Centralized light access network (C-LiAN): a novel paradigm for next generation indoor VLC networks
Kizilirmak, R. Ç.; Narmanlıoğlu, Ömer; Uysal, Murat (IEEE, 2017)Visible light communication (VLC) builds upon the idea of using existing lighting infrastructure for wireless data transmission. In a conventional VLC network, each light fixture acts as an access point (AP) which are ... -
Cooperative MIMO-OFDM based inter-vehicular visible light communication using brake lights
Narmanlıoğlu, Ömer; Turan, B.; Ergen, S. C.; Uysal, Murat (Elsevier, 2018-05)Inter-vehicular connectivity to enhance road safety and support highly autonomous driving is increasingly becoming popular. Despite the prevalent works on radio-frequency (RF) based vehicular communication schemes, visible ... -
Cooperative visible light communications with full-duplex relaying
Narmanlıoğlu, Ömer; Kizilirmak, R. Ç.; Miramirkhani, Farshad; Uysal, Murat (IEEE, 2017-06)In this paper, we investigate cooperative visible light communication (VLC) system where an intermediate light source acts as a relay terminal. We assume that relay terminal operates in full-duplex mode. In contrast to ... -
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 ... -
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 ... -
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 ... -
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 ... -
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. ... -
The impact of pulse shaping filters on OFDM-based visible light communications
Narmanlıoğlu, Ömer; Kızılırmak, R. C.; Uysal, Murat (IEEE, 2017)This paper discusses the impact of pulse shaping filter on the performance of orthogonal frequency division multiplexing (OFDM) based visible light communication (VLC) systems. Particularly, direct current biased optical ... -
Joint bit and power loading for adaptive MIMO OFDM VLC systems
Siddiqi, U. F.; Narmanlıoğlu, Ömer; Uysal, Murat; Sait, S. M. (Wiley, 2020-07)Visible light communication (VLC) is a short-range wireless access technology based on the dual use of illumination structure. The frequency-selective characteristics of VLC channels motivate the use of orthogonal frequency ... -
Limited feedback channel estimation for multi-user massive mimo visible light communications
Narmanlıoğlu, Ömer; Uysal, Murat (IEEE, 2020)Building on the existing illumination infrastructure, visible light communication (VLC) utilizes light emitting diode (LED) luminaries as wireless access points. The presence of large number of ceiling lights in conference ... -
Link adaptation for MIMO OFDM visible light communication systems
Narmanlıoğlu, Ömer; Kizilirmak, R. C.; Baykas, T.; Uysal, Murat (IEEE, 2017-11-10)In this paper, we investigate link adaptation for an orthogonal frequency division multiplexing (OFDM)-based multiple-input multiple-output (MIMO) visible light communication (VLC) system. The proposed adaptive OFDM VLC ... -
Markov-based performance analysis of medium access in visible light communications
Shams, Parvaneh; Narmanlıoğlu, Ömer; Erol-Kantarcı, M.; Uysal, Murat (IEEE, 2015)Visible light communication (VLC) uses the illumination infrastructure to provide high speed wireless connectivity. VLC has recently emerged as a promising alternative/complementary technology to conventional radio-frequency ... -
Measurement based non-line-of-sight vehicular visible light communication channel characterization
Turan, B.; Narmanlıoğlu, Ömer; Koc, O. N.; Kar, E.; Coleri, S.; Uysal, Murat (IEEE, 2022-09)Vehicular visible light communication (V-VLC) aims to provide secure complementary vehicle-to-everything-communications (V2X) to increase road safety and traffic efficiency. V-VLC provides directional transmissions, mainly ... -
MIMO-OFDMA tabanlı hücresel ağlarda zamanlayıcıların performans değerlendirmesi
Narmanlıoğlu, Ömer; Zeydan, E. (IEEE, 2017)Bu bildiride çok-girdili çok-çıktılı (multiple-input multiple-output, MIMO) ve ortogonal frekans bölmeli çoklu erişim (orthogonal frequency division multiple access, OFDMA) tabanlı hücresel kablosuz ağlarda farklı algoritmalara ... -
A mobile channel model for vlc and application to adaptive system design
Miramirkhani, Farshad; Narmanlıoğlu, Ömer; Uysal, Murat; Panayirci, E. (IEEE, 2017-05)In this letter, we propose a realistic channel model for visible light communication (VLC) assuming a mobile user. Based on non-sequential ray tracing, we first obtain channel impulse responses for each point over the user ... -
Multi-user massive MIMO visible light communications with limited pilot transmission
Narmanlıoğlu, Ömer; Uysal, Murat (IEEE, 2022-06-01)Visible light communication (VLC) building on the existing illumination infrastructure utilizes light emitting diode (LED) luminaries as wireless transmitters. To achieve data rates on the order of gigabits per second in ... -
Neural network based digital pre-distorter design for DCO-OFDM visible light communications
Narmanlıoğlu, Ömer; Turan, B.; Coleri, S.; Uysal, Murat (IEEE, 2022)Direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) is an appealing modulation scheme for reliable, high-speed optical transmissions and foreseen to be used in the upcoming IEEE 802.11bb ... -
On the performance of MIMO OFDM-based intra-vehicular VLC networks
Turan, B.; Narmanlıoğlu, Ömer; Coleri Ergen, S.; Uysal, Murat (IEEE, 2016)Vehicular hotspots for on-board Internet access using Long Term Evolution (LTE) as the backhaul network has recently gained popularity. Currently, Wi-Fi is the most common technology to provide in-vehicle access, where ...
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