Browsing Electrical & Electronics Engineering by Author "1"
Now showing items 21-40 of 294
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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 ... -
Axial charges of octet baryons in two-flavor lattice QCD
Erkol, Güray; Oka, M.; Takahashi, T. T. (Elsevier, 2010-03-15)We evaluate the strangeness-conserving NN, ΣΣ, ΞΞ, ΛΣ and the strangeness-changing ΛN, ΣN, ΛΞ, ΣΞ axial charges in lattice QCD with two flavors of dynamical quarks and extend our previous work on pseudoscalar-meson–octet-baryon ... -
Bit error rate analysis of MISO FSO systems
Gökçe, M. C.; Baykal, Y.; Uysal, Murat (Informa Group Company, 2016-05-09)Multiple-input single-output (MISO) systems are employed in free space optical (FSO) links to mitigate the degrading effects of atmospheric turbulence. In this paper, we consider a MISO FSO system with practical transmitter ... -
Blood coagulation time measurement using a 1μL of whole blood on a TE mode BAW resonator
Majidi, Negar; Sobhani, M. R.; Yaralıoğlu, Göksen Göksenin (IEEE, 2018-12-20)This paper presents a possible way to blood coagulation time measurement using a TE (Thickness Extensions) mode BAW (Bulk Acoustic Wave) resonator which requires as low as 1 micro-liter of whole blood. The blood sample is ... -
Cache replacement scheme based on sliding window and TTL for video on demand
Raouf, Amir Hossein Fahim; Abouei, J. (IEEE, 2018-09-25)In this paper, we propose a novel two-phased cache replacement algorithm based on the dataset obtained from a typical wireless mesh network. In the first phase, we aim to make a trade-off between the networks resources and ... -
Cantilever array oscillators with nonlinear optical readout
Lüleç, S. Z.; Adiyan, U.; Yaralıoğlu, Göksen Göksenin; Leblebici, Y.; Urey, H. (IEEE, 2015)MEMS array oscillators typically require a separate detector and feedback loop for each oscillator. We show that grating-based-optical-readout induces nonlinearity, which enables simultaneous operation of an array-of-oscillators ... -
Capacity analysis of free space optical links for a partially coherent gaussian beam over a turbulent channel with pointing errors
Lee, I. E.; Ghassemlooy, Z.; Ng, W. P.; Khalighi, M. A.; Uysal, Murat (IEEE, 2013)In this paper, we investigate the joint effects of beam width and the spatial coherence length in a partially coherent free-space optical (FSO) link from the information theory perspective, taking into account the combined ... -
Capacity of hybrid cognitive radio networks with distributed VAAs
Hong, X.; Wang, C.-X.; Uysal, Murat; Ge, X.; Ouyang, S. (IEEE, 2010-09)A cooperative hybrid cognitive radio (CR) network is proposed to simultaneously operate on a dedicated licensed band and a secondary band. The licensed band is used for communications between a base station (BS) and mobile ... -
A cartridge based sensor array platform for multiple coagulation measurements from plasma
Cakmak, O.; Ermek, E.; Kilinc, N.; Bulut, S.; Baris, I.; Kavakli, I. H.; Yaralıoğlu, Göksen Göksenin; Urey, H. (Royal Society of Chemistry, 2015)This paper proposes a MEMS-based sensor array enabling multiple clot-time tests for plasma in one disposable microfluidic cartridge. The versatile LoC (Lab-on-Chip) platform technology is demonstrated here for real-time ... -
Channel estimation for amplify-and forward relaying: cascaded against disintegrated estimators
Amin, O.; Gedik, B.; Uysal, Murat (IEEE, 2010)The authors investigate the performance of amplify-and-forward relaying with two different pilot-symbol-assisted channel estimation methods. In the first estimation method, the cascaded channel consisting of source-to-relay ... -
Channel estimation in underwater cooperative OFDM system with amplify-and-forward relaying
Şenol, H.; Panayırcı, E.; Erdoğan, M.; Uysal, Murat (IEEE, 2012)This paper is concerned with a challenging problem of channel estimation for amplify-and-forward cooperative relay based orthogonal frequency division multiplexing (OFDM) systems in the resence of sparse underwater acoustic ... -
Chaotic polarization-assisted L DPSK-MPPM modulation for free-space optical communications
Elfiqi, A. E.; Khallaf, Haitham S.; Hegazy, S. F.; Elsonbaty, A.; Shalaby, H. M. H.; Obayya, S. S. A. (IEEE, 2019-09)In this paper, we present a polarization-assisted L-ary differential phase-shift keying multipulse pulse-position modulation (PA.LDPSK-MPPM) technique that is secured in the physical layer by a discrete-chaos system. The ... -
Co-optimization of transmission maintenance scheduling and production cost minimization
Poyrazoğlu, Göktürk; Oh, H. (MDPI, 2019-08-01)Regular transmission maintenance is important to keep the infrastructure resilient and reliable. Delays providing on-time maintenance increase the forced outage rate of those assets, causing unexpected changes in the ... -
Coagulation measurement from whole blood using vibrating optical fiber in a disposable cartridge
Yaraş, Y. S.; Gündüz, A. B.; Sağlam, G.; Ölçer, S.; Civitçi, F.; Baris, İ.; Yaralıoğlu, Göksen Göksenin; Urey, H. (SPIE, 2017-11)In clinics, blood coagulation time measurements are performed using mechanical measurements with blood plasma. Such measurements are challenging to do in a lab-on-a-chip (LoC) system using a small volume of whole blood. ... -
Cognitive cooperative MAC with one primary and two secondary users: Achievable rates and optimal power control
Edemen, Çağatay; Kaya, O. (IEEE, 2014-11)We consider a three-user fading cognitive cooperative multiple access channel (MAC) with one primary and two secondary transmitters. We propose two encoding/decoding strategies with varying levels of cooperation, based on ... -
Color filters: When “optimal” is not optimal
Trussell, H. J.; Ercan, Ali Özer; Kingsbury, N. G. (IEEE, 2016)It is well known that many more than three or four spectral measurements are required for accurate measurement of color. Previous work has shown seven to ten measurements can yield accurate results on average, but with ... -
Combined aes + aegis architectures for high performance and lightweight security applications
Şahin, Furkan (2014-08)Günümüzde kriptografi banka kartlarından telefonlara, arabalardan haberleşme araçlarına ve bulut hizmetlerine kadar pek çok alana girdi. Digital bilgiyi yetkilendirilmemiş erişimlere karşı korumak için bir çok şifreleme ... -
A communication theoretical analysis of multiple-access channel capacity in magneto-inductive wireless networks
Gülbahar, Burhan (IEEE, 2017-06)Magneto-inductive (MI) wireless communications is an emerging subject with a rich set of applications, including local area networks for the Internet-of-Things, wireless body area networks, in-body and on-chip communications, ... -
Comparison of text-independent speaker verification systems in a multi-class, semi-automatic detection scenario
Yeşil, Fatih (2013-06)Performance of the speaker veri cation systems is typically measured based on their binary decision accuracy. Soft outputs of the systems are used mostly for calibration or multiple system combination purposes. However, ... -
Connectivity brokerage: from coexistence to collaboration
Parsa, A.; Ercan, Ali Özer; Malagon, P.; Burghardt, F.; Rabaey, J. M.; Wolisz, A. (IEEE, 2010)The explosive growth in the density of wirelessly connected devices and their traffic load is creating interference and gradually leading to a severe spectrum shortage. Approaches to address this challenge include dynamic ...
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