Browsing by Author "(ORCID 0000-0001-5945-0813 & YÖK ID 124615) Uysal, Murat"
Now showing items 141-160 of 350
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The impact of location errors on achievable rates in OFDM-based multi-user visible light communication systems
Kashef, M.; Abdallah, M.; Qaraqe, K.; Uysal, Murat (IEEE, 2014)Visible light communication (VLC) is a communication technology in which data is transferred by modulating the visible light intensity. VLC signals degrade significantly due to the absence of the line of sight (LOS) between ... -
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 ... -
Implementation of network coding in wireless systems
Basaran, S. T.; Heidarpour, A. R.; Gokceli, S.; Kurt, G. K.; Uysal, Murat; Altunbas, I. (Springer Nature, 2018)In this chapter, we target to give extensive performance analyses about application of network coding (NC) in wireless systems, referred to as network coded cooperation (NCC), brings both diversity and multiplexing gains. ... -
Implementation of software-defined adaptive DCO-OFDM for vehicular visible light communication
Tettey, D. K.; Elamassie, Mohammed; Uysal, Murat (IEEE, 2023)With its high data rates and electromagnetic interference-free operation capability, visible light communication (VLC), has emerged as a potential candidate for 6G and beyond networks. In this work, we present the preliminary ... -
Incremental diversity order for characterization of FSO communication systems over lognormal fading channels
Elamassie, Mohammed; Uysal, Murat (IEEE, 2020-04)Free space optical (FSO) communication systems experience atmospheric turbulence-induced fading, which is typically modelled by lognormal distribution. Since the decreasing rate of error probability over lognormal fading ... -
Indoor channel modelling and characterization for visible light communications
Sarbazi, Elham; Uysal, Murat; Abdallah, M.; Qaraqe, K. (IEEE, 2014)In this paper, we investigate channel modeling for visible light communications using ray tracing approach. The simulation environment is created in Zemax® and enables us to specify the geometry of the environment, the ... -
Information theoretic analysis and optimization of underwater acoustic communication systems
Nouri, Hatef; Uysal, Murat (IEEE, 2013)In this paper, we investigate the information theoretical limits of underwater acoustic channel with intersymbol interference. Under the assumptions of sparse and frequency-selective Rician fading channel and non-white ... -
Information theoretic analysis of hybrid-ARQ protocols in coherent free-space optical systems
Aghajanzadeh, S. M.; Uysal, Murat (IEEE, 2012-05)Automatic retransmission request (ARQ) is a feedback-based data link layer technique which enhances the reliability of communication in fading channels. In this paper, we investigate the performance of hybrid-ARQ (H-ARQ) ... -
Information theoretic performance of cooperative underwater acoustic communications
Al-Dharrab, S.; Uysal, Murat (IEEE, 2011)Cooperative communication is considered as a major enabling technique to meet the demanding performance requirements of future underwater acoustic (UWA) communication systems. In this paper, we investigate the information ... -
Information theoretical performance analysis and optimisation of cooperative underwater acoustic communication systems
Nouri, Hatef; Uysal, Murat; Panayirci, E. (IEEE, 2016-05)In this study, the authors investigate the information theoretical limits on the performance of single-carrier cooperative underwater acoustic communication systems in the presence of intersymbol interference. The authors ... -
Information theoretical performance limits of single-carrier underwater acoustic systems
Nouri, Hatef; Uysal, Murat; Panayırcı, E.; Senol, H. (IEEE, 2014)In this study, the authors investigate the information theoretical limits on the performance of point-to-point single-carrier acoustic systems over frequency-selective underwater channels with intersymbol interference. ... -
Infrastructure-to-vehicle cooperative communications with decode-and-forward relaying
Feteiha, M. F.; Uysal, Murat (IEEE, 2011)In this paper, we consider infrastructure-to-vehicle cooperative communications in which roadside access points use vehicles as relaying terminals. This can be particularly useful in suburban or remote areas where the ... -
Infrastructure-to-vehicle visible light communications: Channel modelling and performance analysis
Eldeeb, Hossien Badr Hossien; Elamassie, Mohammed; Sait, S. M.; Uysal, Murat (IEEE, 2022-03)Visible light communication (VLC) has emerged as a potential wireless connectivity solution for infrastructure-to-vehicle (I2V) communications. In this paper, we investigate the performance of I2V VLC systems with access ... -
Interference management strategies for multiuser multicell MIMO VLC systems
Naser, S.; Bariah, L.; Muhaidat, S.; Al-Qutayri, M.; Uysal, Murat; Sofotasios, P. C. (IEEE, 2022-09)This paper investigates different precoding strategies for rate splitting multiple access (RSMA) in the downlink of multi-cell visible light communication (VLC) networks. Since classical Shannon capacity formula does not ... -
Introduction
Arnon, S.; Barry, J.; Aragiannidis, G.; Schober, R.; Uysal, Murat (Cambridge University Press, 2012)Optical wireless communications is a dynamic area of research and development. Combining fundamental theory with a broad overview, this book is an ideal reference for anyone working in the field, as well as a valuable guide ... -
Iterative near maximum-likelihood sequence detection for MIMO optical wireless systems
Chatzidiamantis, N. D.; Uysal, Murat; Tsiftsis, T. A.; Karagiannidis, G. K. (IEEE, 2010-04)A major performance-limiting factor in terrestrial optical wireless (OW) systems is turbulence-induced fading. Exploiting the additional degrees of freedom in the spatial dimension, multiple laser transmitters combined ... -
Iterative signal detection under timing errors for optical wireless links with high mobility
Dabiri, M. T.; Khankalantary, S.; Safi, H.; Piran, Md.J.; Ansari, I. S.; Suh, D.Y.; Uysal, Murat (IEEE, 2021-11-01)In this paper, the problem of timing error for freespace optical links with high mobility is investigated. In particular, we consider a real scenario in which the sampling clock offset is randomly changing and, in addition, ... -
İşbirlikli haberleşmede birleştirilmiş zaman kayması ve sönümlemeli kanal katsayısı kestirimi
Çelik, Y.; Odabaşıoğlu, N.; Uysal, Murat (IEEE, 2013)In this paper, we investigate joint channel gain and time offset estimation for two different data aided methods in cooperative communication with amplify-and-forward (AF) relaying. First one is the Cascaded Estimation ... -
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 ... -
Joint lifetime-outage optimization in relay-enabled IoT networks—A deep reinforcement learning approach
Heidarpour, A. R.; Heidarpour, M. R.; Ardakani, M.; Tellambura, C.; Uysal, Murat (IEEE, 2023-01)Network lifetime maximization in Internet of things (IoT) is of paramount importance to ensure uninterrupted data transmission and reduce the frequency of battery replacement. This letter deals with the joint lifetime-outage ...
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