• Termination transformation theorem for microwave power transfer networks 

  Köprü, Ramazan (World Scientific Publishing Co. Pte Ltd, 2019-06-03)

  Termination transformation theorem (TTT) proposed in this work transforms a doubly complex terminated microwave power transfer network (PTN) to an equivalent doubly resistively terminated termination transformed network ...

• A frequency tunable broadband amplifier utilizing tunable capacitors and inductors 

  Nesimoǧlu, Tayfun; Aydın, Çağatay; Atilla, Doǧu Çaǧdaş; Yarman, Binboǧa Sıddık (2013)

  Software Defined Radio (SDR) technology aims employing commercial communication standards within a single transceiver unit. Therefore, the design of broadband frequency tunable microwave components; particularly tunable ...

• Occlusion aware motion compensation for video frame rate up-conversion 

  Çizmeci, Burak; Ateş, Hasan Fehmi (2010)

  Since the emergence of high definition (HD) display technologies, video standards conversion problem has become an important issue in storage, transmission and display of video content. Video frame rate up-conversion (FRUC) ...

• An annular CMUT array beamforming system for high-frequency side looking IVUS imaging 

  Satır, Sarp; Gürün, Gökçe; Zahorian, Jaime S.; Karaman, Mustafa; Hasler, Paul E.; Değertekin, Levent (2010)

  A CMUT annular array system for Side-Looking Intravascular Ultrasound (SL-IVUS) with fixed transmit and dynamic receive focusing capabilities has been developed. The system was experimentally characterized and validated ...

• Realization of preprocessing blocks of CNN based CASA system on FPGA 

  Şavkay, Osman Levent; Yıldız, Nerhun; Cesur, Evren; Yalçın Müştak, Erhan; Tavşanoğlu, Vedat (2013)

  In this paper, hardware optimization of the preprocessing part of a computer aided semen analysis (CASA) system is proposed, which is also implemented on an FPGA device as a working prototype. A real-time cellular neural ...

• Simulated annealing based optimization of dual-ring arrays for forward-looking IVUS and ICE imaging 

  Tekeş, Coşkun; Karaman, Mustafa; Deǧertekin, Fahrettin Levent (2010)

  Forward-Looking (FL) catheter based imaging systems are highly desirable for guiding interventions in intravascular ultrasound (IVUS) and intracardiac echocardiography (ICE) applications. One of the main challenges in the ...

• Solid-state SL-IVUS arrays based on non-uniform aperture sampling 

  Şişman, Alper; Karaman, Mustafa; Gürün, Gökçe; Değertekin, Fahrettin Levent (IEEE, 2010)

  We propose new reconfigurable ring and cylindrical array designs using non-uniform (Fresnel) aperture sampling with identical differential delays between adjacent elements which reduces the beamformer complexity. For ...

• Real-time frame buffer implementation based on external memory using FPGA 

  Davutoğlu, Doğancan; Yıldız, Nerhun; Ayten, Umut Engin; Tavşanoǧlu, Vedat (Elsevier B.V., 2018)

  In this paper, design of a real-time video frame buffer with an external memory interface is proposed. In addition, simulation and implementation processes of the design is described. The mentioned system is able to buffer ...

• Optimal nonlinear control of two-link flexible arm with adaptive internal model 

  Doğan, Mustafa; İstefanopulos, Yorgo (2005)

  The control of highly nonlinear multi-link flexible arms is subject to uncertainties caused by backlash, payload changes and external disturbances.Therefore, adaptive and robust control of multi-link flexible arms is a ...

• Robust stability analysis of a class of delayed neural networks 

  Özcan, Neyir; Arık, Sabri (2012)

  This paper studies the global robust stability of delayed neural networks. A new sufficient condition that ensures the existence, uniqueness and global robust asymptotic stability of the equilibrium point is presented. The ...

• A low-complexity KL expansion-based channel estimator for OFDM systems 

  Şenol, Habib; Çırpan, Hakan Ali; Panayirci, Erdal (Springer International Publishing, 2005-04-05)

  This paper first proposes a computationally efficient, pilot-aided linear minimum mean square error (MMSE) batch channel estimation algorithm for OFDM systems in unknown wireless fading channels. The proposed approach ...

• Wavelet-based image compression by hierarchical quantization indexing 

  Ateş, Hasan Fehmi; Tamer, Engin (IEEE, 2009)

  In this paper, we introduce the quantization index hierarchy, which is used for efficient coding of quantized wavelet coefficients. A hierarchical classification map is defined in each wavelet subband, which describes the ...

• The confluent edge and tip singularities of the electromagnetic wave on material sheets 

  İdemen, Mehmet Mithat (2004)

  The singularities of the electromagnetic wave at sharp edges and tips effect the performance of electric devices and, hence, requires serious precautions at both the design and production stages. Furthermore, in theoretical ...

• Adaptive Volterra channel equalisation with lattice orthogonalisation 

  Özden, Mehmet Tahir; Kayran, Ahmet Hamdi; Panayırcı, Erdal (Institution of Engineering and Technology, 1998-04)

  The authors present a new recursive least-squares adaptive nonlinear equaliser based on Volterra series expansion. The main approach is to transform the nonlinear equalisation problem into an equivalent multichannel, but ...

• Eurasip Journal on Wireless Commuication and Networking: Editorial 

  Panayırcı, Erdal; Georghiades, Costas N.; Wang, Xinheng; Çırpan, Hakan Ali (Springer International Publishing, 2005-04-15)

  [No abstract available]

• Kinematic analysis of robotic bevel-gear trains: An application of network model approach 

  Uyguroǧlu, Mustafa Kemal; Tokad, Yılmaz (Springer Netherlands, 1998-04)

  The network model approach for rigid and multi-rigid body systems developed recently [1,2] can also be used conveniently in formulating system equations or equations of motion of three-dimensional mechanical systems of ...

• Design of optimum nyquist signals based on generalized sampling theory for data communications 

  Panayırcı, Erdal; Özuǧur, Timuçin; Çaǧlar, Hakan (IEEE, Piscataway, NJ, United States, 1999-06)

  A new method is given for the optimal design of bandlimited Nyquist-type signal shapes for data communications, which maximizes its energy in a given time interval. The method is based on the periodically nonuniform sampling ...

• Radio resource management for OFDMA-based mobile relay enhanced heterogenous cellular networks 

  Baştürk, İlhan; Özbek, Berna; Edemen, Çaǧatay; Tan, Ahmet Serdar; Zeydan, Engin; Ergüt, Salih (2013)

  In this paper, we focus on the radio resource management problem for the Orthogonal Frequency Division Multiple Access (OFDMA)-based mobile relay-enhanced het erogenous cellular networks. We combine mobile relaying and ...

• 3-D spatio-temporal Gabor-type filter implementations with Time-Derivative Cellular Neural Networks 

  Yavuz, Oǧuzhan; Tural-Polat, Sadiye Nergis; Cesur, Evren; Tavşanoǧlu, Vedat (IEEE, 2013)

  In this paper, a 3-D spatio-temporal Gabor-type filter is implemented using Time-Derivative Cellular Neural Network (TDCNN) structure. To this end, the transfer function of the spatio-temporal filter previously constructed ...

• Front-end CMOS electronics for monolithic integration with CMUT arrays: Circuit design and initial experimental results 

  Gürün, Gökçe; Qureshi, Muhammad Shakeel; Balantekin, Müjdat; Güldiken, Rasim Oytun; Zahorian, Jaime S.; Peng, Shengyu; Basu, Arindam; Karaman, Mustafa; Hasler, Paul E.; Değertekin, Levent (2008)

  This paper discusses design of CMOS-ASICs for monolithic integration of CMUT arrays by post-CMOS fabrication. We describe design strategies for monolithic integration and demonstrate the advantages of CMUT-on-CMOS approach. ...

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