Browsing Electrical & Electronics Engineering by Author "2"
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Channel modelling for indoor visible light communications
Miramirkhani, Farshad; Uysal, Murat (Royal Society Publishing, 2020-04-17)Visible light communication (VLC) allows the dual use of light-emitting diodes (LEDs) for wireless communication purposes in addition to their primary purpose of illumination. As in any other communication system, realistic ... -
Channel modelling for light communications: Validation of ray tracing by measurements
Eldeeb, Hossıen Badr; Uysal, Murat; Mana, S. M.; Hellwig, P.; Hilt, J.; Jungnickel, V. (IEEE, 2020)Light communications, also denoted as LiFi, is promising for future wireless indoor networks. For performance evaluation, the IEEE P802.15.13 and P802.11bb standardization groups agreed upon channel models based on ... -
Colour gamut enhancement with remote light conversion mechanism
Köseoğlu, Devrim; Sezer, Yusuf Sinan; Karslı, K. (IOP Publishing, 2018)The backlight unit spectrum of liquid crystal displays (LCD) directly affects the colour gamut. With the invention of GaN based blue light emitting diodes (LED), phosphors and quantum dots (QD) have gained considerable ... -
Comparative performance evaluation of MIMO visible light communication systems
Damen, M. O.; Narmanlioglu, Omer; Uysal, Murat (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 ... -
Continuous phase modulation with chaotic interleaving for visible light communication systems based on orthogonal frequency division multiplexing
Eldeeb, Hossıen Badr; Al‐Nahhal, Mohamed; Selmy, H. A. I.; Abd El-Samie, F. E. (Wiley, 2020-09)Visible light communication (VLC) is one of the most promising technologies which offers high data rates and flexible cost‐effective networking solutions for indoor applications. In VLC systems, the optical orthogonal ... -
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 ... -
Coriolis Effect on elastic waves propagating in rods
Çetin, Hakan; Yaralıoğlu, Göksen Göksenin (Elsevier, 2020-10-27)Vibration analysis of rods that are subjected to rotation is presented. It is shown that flexural-flexural, longitudinal-flexural and torsional-flexural wave coupling occur due to the Coriolis Effect. First, we carried out ... -
Coverage of a shopping mall with flexible OLED-based visible light communications
Chaleshtori, Z. N.; Zvanovec, S.; Ghassemlooy, Z.; Eldeeb, Hossıen Badr; Uysal, Murat (The Optical Society, 2020-03-30)Visible light communications (VLC) can utilize light-emitting diodes (LEDs) to provide illumination and a safe and low-cost broadcasting network simultaneously. In the past decade, there has been a growing interest in using ... -
Crucial topics in computer architecture education and a survey of textbooks and papers
Yıldız, A.; Gören, S.; Uğurdağ, Hasan Fatih; Aktemur, B.; Akdoğan, Taylan (International Association of Engineers, 2020)We have been teaching undergraduate computer architecture since 2012 in an unconventional way. Most undergraduate computer architecture courses are based on microprocessors, and they quickly move into advanced topics such ... -
DCT-OFDM tabanlı görünür ışık haberleşmesi
Narmanlıoglu, Ömer; Uysal, Murat (2016)Visible light communication (VLC) is a short-range wireless transmission technique in which light emitting diodes (LEDs) are used as data transmitters. Because of non-coherent characteristics of LEDs, only intensity can ... -
Design and implementation of dual band microstrip patch antenna for WLAN energy harvesting system
Amjad, Osama; Munir, Syeda Wajiha; Imeci, S. T.; Ercan, Ali Özer (2018-07)Since the demand for self-sustained wireless systems is increasing, there is a trend towards RF energy harvesting. It is a key solution to energize the low power systems such as the Internet of Things (IoT) devices without ... -
Design and kinematics of 4- DoF multi-purpose wearable mechanical arm (MUWA) support for enhanced operation stability
Nomanfar, P.; Tekin, Ahmet; Bogosyan, S.; Şendur, Polat (IEEE, 2019)A low-cost motor-less simple wearable mechanical arm support unit is presented as a viable alternative to todays assistive exoskeleton support units. By limiting the functionality of the device to stabilization rather than ... -
Design and simulation of antenna with defected ground plane
Gurelli, Umur Can; Dindar, Sinan; Balci, Merve; Rizeli, Dilara; İmeci, T.; Durak, T. (IEEE, 2016)In this work a patch antenna having defected ground plane is designed and simulated. Design includes two dielectric layers and some modifications at the top layer such as having a slit and a slot. Simulation results are ... -
Design and simulation of microfluidic device for metabolite screening and quantitative monitoring of drug uptake in cancer cells
Asif, Afia; Khawaldeh, S.; Khan, Muhammad Salman; Tekin, Ahmet (Sciendo, 2018)Although liquid-liquid extraction methods are currently being applied in many areas such as analytical chemistry, biochemical engineering, biochemistry, and biological applications, accessibility and usability of microfluidics ... -
The design of a high gain dual-polarized quad-ridged circular horn antenna for wideband EMC test applications
Solak, Bekir; Seçmen, M.; Tekin, Ahmet (The Applied Computational Electromagnetics Society, 2018-09)This paper presents the design of a high gain broadband quadruple-ridged circular horn antenna for Electromagnetic Compatibility (EMC) testing. The proposed antenna contains a wideband feed structure as a transition between ... -
Design of compact monopulse standing wave slotted array in ku-band
Akgiray, Ahmed Halid; Nawaz, Wasim (IEEE, 2019)In modern radar and communication systems, high gain, high power capability and low-profile front-end antenna systems are frequently utilized. In this paper, a compact, lightweight, high reflection bandwidth and high gain ... -
Distance and power based experimental verification of channel model in visible light communication
Kısacık, Rıfat; Efe, B. C.; Pusane, A. E.; Uysal, Murat; Baykas, T.; Dündar, G.; Yalcinkaya, A. D. (IEEE, 2019)In this work, a channel model for line-of-sight (LOS) in visible light communication is elaborated. In the proposed channel model, there is no optical component, such as filter or lens, between the transmitting LED and the ... -
Diversity-multiplexing tradeoff for log-normal fading channels
Nouri, Hatef; Uysal, Murat (IEEE, 2016-07)Although there has been a growing interest on the study of diversity-multiplexing tradeoff (DMT), the existing works are mostly restricted to the outcomes reported for Rayleigh, Rician, and Nakagami fading channels. In ... -
Diversity-multiplexing tradeoff for network coded cooperative OFDMA systems
Heidarpour, Ali Reza; Kurt, G. K.; Uysal, Murat (IEEE, 2015)Network coded cooperation (NCC) is an effective method to improve the throughput efficiency in cooperative wireless networks. In an effort to have further gains over the initial works, which build upon the assumption of ... -
Dopamine detection using mercaptopropionic acid and cysteamine for electrodes surface modification
Khan, Muhammad Salman; Asif, Afia; Khawaldeh, S.; Tekin, Ahmet (Sciendo, 2018)Gold electrodes are often not suitable for dopamine measurements as dopamine creates a non-conducting polymer layer on the surface of the electrodes, which leads to increased amount of electrode passivity with the gradual ...
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