Browsing Faculty of Engineering by Subject "OFDM"
Now showing items 1-20 of 22
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Achievable data rates and power allocation for frequency-selective fading relay channels with imperfect channel estimation
(Springer Science+Business Media, 2012-12)In this article, we investigate the information-theoretical performance of a cooperative orthogonal frequency division multiplexing (OFDM) system with imperfect channel estimation. Assuming the deployment of training-aided ... -
Adaptive power loading for multi-relay OFDM regenerative networks with relay selection
(IEEE, 2012-03)In this paper, we propose an adaptive power loading algorithm for an OFDM (orthogonal frequency division multiplexing)-based multi-relay regenerative network with relay selection. The proposed scheme is based on selecting ... -
Broadcasting brake lights with MIMO-OFDM based vehicular VLC
(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 ... -
Comparative performance evaluation of MIMO visible light communication systems
(IEEE, 2016)In this paper, we consider multiple-input multiple-output (MIMO) visible light communication (VLC) systems. The physical layer of VLC system builds upon optical orthogonal frequency division multiplexing (O-OFDM). Repetition ... -
Cooperative MIMO-OFDM based inter-vehicular visible light communication using brake lights
(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
(Springer Science+Business Media, 2016)In this chapter, we explore the concept of cooperative transmissions in the context of visible light communications (VLC). An indoor office space is considered with two light sources; the one at the ceiling is connected ... -
Effect of wiring and cabling topologies on the performance of distributed MIMO OFDM VLC systems
(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 ... -
Generalized LED index modulation optical OFDM for MIMO visible light communications systems
(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. ... -
Görünür ışık kanalların modellenmesi ve ACO-OFDM için başarım analizi
(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 ... -
Limited feedback channel estimation for multi-user massive mimo visible light communications
(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
(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 ... -
On the performance of MIMO OFDM-based intra-vehicular VLC networks
(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 ... -
Optimal bit and power loading for amplify-and-forward cooperative OFDM systems
(IEEE, 2011-03)In this paper, we investigate bit and power allocation strategies for an orthogonal frequency division multiplexing (OFDM) cooperative network over frequency-selective fading channels. We assume amplify-and-forward relaying ... -
Performance analysis and optimization of unipolar OFDM based relay-assisted visible light communications☆☆
(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
(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 ... -
Relay-assisted OFDM for NLOS ultraviolet communication
(2015)Ultraviolet (UV) communication enables non-line-of-sight (NLOS) outdoor wireless connectivity and is particularly desirable to relax or eliminate pointing and tracking requirements of infrared links. The main two degrading ... -
Relay-assisted OFDM for ultraviolet communications: performance analysis and optimization
(IEEE, 2017)Ultraviolet (UV) communication enables non-line-of-sight (NLOS) outdoor wireless connectivity and is particularly desirable to relax or eliminate pointing and tracking requirements of infrared links. In comparison to ... -
Relay-assisted OFDM-based visible light communications
(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 over multipath channels
(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 ... -
Single color networks: OFDM-based visible light broadcasting
(IEEE, 2015)In this study, we investigate the performance of optical orthogonal frequency division multiplexing (O-OFDM) based visible light broadcasting. Although indoor spaces usually have more than one light source, most of the ...
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