Browsing 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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 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 ... -
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 ... -
Rate-adaptive OFDM MIMO VLC system
Narmanlıoğlu, Ömer; Kızılırmak, R. Ç.; Miramirkhani, Farshad; Uysal, Murat (IEEE, 2018-01-19)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 MIMO system under consideration ... -
Relay-assisted OFDM-based visible light communications
Kızılırmak, R. Ç.; Narmanlıoğlu, Ömer; Uysal, Murat (IEEE, 2015-10)In this study, we investigate a relay-assisted visible light communication (VLC) system where an intermediate light source cooperates with the main light source. Specifically, we consider two light sources in an office ... -
Relay-assisted OFDM-based visible light communications
Narmanlıoğlu, Ömer (2016-08)In this study, a relay-assisted visible light communication (VLC) system where an intermediate light source cooperates with the main light source is investigated. Specifically, two light sources in an office space; one is ... -
Relay-assisted OFDM-based visible light communications over multipath channels
Narmanlıoğlu, Ömer; Kizilirmak, R. C.; Uysal, Murat (IEEE, 2015-07)In this paper, we investigate the performance of relay-assisted visible light communication (VLC) system over multipath channels. We consider an indoor environment where the ceiling light serves as the information source ...
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