Browsing Electrical & Electronics Engineering by Author "Özyeğin University"
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Advanced optical wireless communication systems
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 ... -
Advances in broadband single-carrier transmission techniques: Theory and applications (ABSCTT 2012)
Muhaidat, S.; Uysal, Murat; Tsiftsis, T. A.; Dianati, M.; Abualhaol, I. (IEEE, 2012)The fourth-generation (4G) wireless technology is expected to provide a wide variety of new services including high quality multimedia, internet access and other high-data-rate wireless services. Moreover, 4G technology ... -
Advantages of application-based scheduling for indoor femtocells
Mungan, Devin; Ferazoğlu, Gülden; Sunay, Mehmet Oğuz; Civanlar, Mehmet Reha; Kaytaz, B. (ACM, 2011)This paper presents the necessity of application-based scheduling to maintain QoS requirements of all active applications in an indoor femtocell. A novel scheduler is proposed which takes into account the quality of service ... -
Aerosol attenuation model for high altitude UAV-based FSO links
Elamassie, Mohammed; Uysal, Murat (IEEE, 2022)Free space optical (FSO) communication is well positioned to address connectivity needs in ground-UAV, inter-UAV and UAV-ground links. An accurate performance analysis of airborne FSO links requires the use of proper path ... -
Algorithmic approaches for DER sizing and spatial placement in radial networks
Aydın, Beyzanur; Poyrazoğlu, Göktürk (IEEE, 2023)Deployment of distributed energy resources (DERs) into the unidirectional distribution grid while respecting operational limits such as reliable voltage range, low system losses, etc. poses challenges that require a viable ... -
All-optical amplify-and-forward relaying system for atmospheric channels
Aminikashani, Mohammadreza; Rad, M. M.; Safari, M.; Uysal, Murat (IEEE, 2012-10)In this letter, we investigate the performance of a dual-hop free space optical link with an all-optical amplify-and-forward relay. We employ photon counting methodology and derive closed form expressions for the end-to-end ... -
Analog clock tree synthesis
Güner, Gökhan (2014-01)Anahtarlamalı analog devrelerin (AAD) saat ağı tasarımı ciddi zaman gerektiren ve yongaların tekrar elden geçirilmesine sebep olabilecek hatalara açık, elle yapılan bir işlemdir. Bu probleme otomatik ya da yarı-otomatik ... -
Analysis and optimization of the network throughput in IEEE 802.15.13 based visible light communication networks
Bülbül, Yusuf; Elamassie, Mohammed; Baykas, T.; Uysal, Murat (IEEE, 2021)In line with the growing interest on visible light communication (VLC), IEEE has initiated standardization efforts on this emerging technology. In this work, we consider IEEE 802.15.13 Optical Wireless Personal Area Networks ... -
Analysis of ALTO protocol over P2P networks
Kökten, Koray (2012-10)Currently, for distributed applications such as Peer-to-Peer (P2P) and Content Delivery Networks (CDNs), the most important challenge is to determine the optimal peer or node selection process, since it sometimes causes ... -
Analysis of asynchronous cognitive radio system with imperfect sensing and bursty primary user traffic
Ercan, Ali Özer (Springer Science+Business Media, 2016-03)This paper presents a theoretical analysis of the spectrum utilization levels in a cognitive radio system. We assume that the traffic of the primary network is bursty and asynchronous with the secondary network, which ... -
Analysis of communication distance and energy harvesting for vehicular VLC using commercial taillights
Refas, S.; Acheli, D.; Yahia, S.; Meraihi, Y.; Eldeeb, Hossıen Badr; Dac Ho, T.; Jiang, L.; Shimamoto, S. (IEEE, 2023)This paper presents an investigation into the communication range and energy harvesting capabilities of a vehicle-to-vehicle (V2V) visible light communication (VLC) system that utilizes commercial taillights (TLs) as ... -
Analysis of field correlations in atmospheric optical MIMO systems
Baykal, Y.; Uysal, Murat (IEEE, 2014)In this paper, we evaluate the absolute field correlations for a free space optical (FSO) multiple-input multiple-output (MIMO) link operating in a turbulent atmosphere. Such knowledge is needed in heterodyne reception to ... -
An antenna for implanted device systems
Zincircioglu, Emircan; Pekdemir, İsmail; Rzayew, Rafiq; Ilıksu, Emre; Dede, Merve; İmeci, Ş. T.; Durak, T. (IEEE, 2017)In this study, we designed and simulated an embedded spiral-shaped microstrip patch antenna for medical biotelemetry applications. Important design parameters were studied to understand their effect on the antenna performance. ... -
Aperture averaging in multiple-input single-output free-space optical systems
Gökçe, M. C.; Baykal, Y.; Kamacıoğlu, C.; Uysal, Murat (SPIE, 2015-06)Multiple-input single-output systems are employed in free-space optical links to mitigate the degrading effects of atmospheric turbulence. We formulate the power scintillation as a function of transmitter and receiver ... -
Aperture averaging in multiple-input single-output free-space optical systems using partially coherent radial array beams
Gökçe, M. C.; Baykal, Y.; Uysal, Murat (The Optical Society, 2016-06)Multiple-input single-output (MISO) techniques are employed in free-space optical (FSO) links to mitigate the degrading effects of atmospheric turbulence. In this paper, for the MISO FSO system, a partially coherent radial ... -
Application-based scheduling for indoor femtocell networks
Mungan, Devin (2013-01)This thesis is concerned with designing a QoS-enabled, application-based scheduler for indoor femtocell networks. For this purpose, a novel scheduler is proposed which takes into account the quality of service (QoS) ... -
Asymptotic performance of generalized transmit laser selection over lognormal turbulence channels
Elamassie, Mohammed; Uysal, Murat (IEEE, 2020-08)In free space optical communication systems, transmit laser selection (TLS) has been proposed as an efficient fading-mitigation technique over turbulence channels. In TLS, the transmitter is equipped with a number of laser ... -
Attack to quantum cryptosystems through RF fingerprints from photon detectors
Durak, Kadir; Jam, Naser Chamani; Karamzadeh, S. (IEEE, 2022-03)The well-known RF penetration method is implemented on the quantum cryptosystems. In this study, RF radiations from the single photon detectors in a quantum key distribution system are intercepted. It was found that the ... -
Auction based spectrum trading for cognitive radio networks
Tehrani, M. N.; Uysal, Murat (IEEE, 2013-06)In this letter, we consider the shared used model in cognitive radio networks and design a spectrum trading method to maximize the total satisfaction of the Secondary Users (SUs) and revenue of the Wireless Service Provider ... -
Automatic detection of attachment style in married couples through conversation analysis
Koçak, Tuğçe Melike; Dibek, B. Ç.; Polat, Esma Nafiye; Kafesçioğlu, Nilüfer; Demiroğlu, Cenk (Springer, 2023-05-31)Analysis of couple interactions using speech processing techniques is an increasingly active multi-disciplinary field that poses challenges such as automatic relationship quality assessment and behavioral coding. Here, we ...
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