Now showing items 1-20 of 65

    • A CNN based rotation invariant fingerprint recognition system 

      Çelik Mayadağlı, Tuba; Saatçı, Ertuğrul; Rifat, Edizkan (Istanbul Unıv, Fac Engineering, Elektrik-Elektronik Mühendisliği Bölümü, Avcılar Kampüsü, İstanbul, 34320, Turkey, 2017)
      This paper presents a Cellular Neural Networks (CNN) based rotation invariant fingerprint recognition system by keeping the hardware implementability in mind. Core point was used as a reference point and detection of the ...
    • A New Method for Doppler Centroid Estimation Based on Block Processing 

      Kartal, Mesut; Tunçay, Pelin (IEEE, 345 E 47Th St, New York, Ny 10017 Usa, 2013)
      Doppler centroid frequency is an important parameter for Synthetic Aperture Radar signal processing, which is used to design a proper matched filter in azimuth domain. Doppler centroid is estimated from the received data. ...
    • A novel EOG-based wireless rapid communication device for people with motor neuron diseases 

      Uşaklı, Ali Bülent; Gürkan, Serkan; Gürkan, Güray (Taylor and Francis Online, 2018-11-22)
      In this study, a new electrooculography (EOG) based system that provides efficient communication for people suffered from motor neuron diseases is presented. The system consists of two distinct devices. The first device ...
    • A synchronous frequency multiplier using phase-locked loop 

      Bilgiç, Mehmet Oruç (Taylor and Francis Online, 1982)
      A useful technique to multiply the frequency of an input square wave by n times without losing synchronization with an original waveform is proposed. A circuit which implements this technique for f = 50 Hz and n = 12 is ...
    • Accreditation for academic quality 

      Şenel, Seçil; Yalçın, Dilek (Int Scientific Conference SGEM, 14, Kilment Ohridsky BLVD, Sofia, 1797, Bulgaria, 2008)
      As it is well-known, the latest trend in academia has been the rapid growth of online or distance learning courses. Globalization makes mobility easy and possible. That is why a graduate has the opportunity to find not ...
    • Adaptive dual-mode OFDM with index modulation 

      Aldırmaz Çolak, Sultan; Acar, Yusuf; Başar, Ertuğrul (Elsevier Science Bv, Po Box 211, 1000 Ae Amsterdam, Netherlands, 2018-10)
      With the integration of the index modulation concept, the popular OFDM has gained an appealing new dimension. However, OFDM with index modulation (OFDM-IM) causes a decrease in data rate for higher order modulations due ...
    • Adjective Check List and Psychological Stress: Evidence From Turkey 

      Erkoç, Tuba; Kurt, Doğuş; Bayramoğlu, Oya; Yıldırım, Halil; Yıldırım, Osman (Int Scientific Conference SGEM, 14, Kilment Ohridsky BLVD, Sofia, 1797, Bulgaria, 2008)
      It is called stress when an individual begins to act different physically and mentally as a result of the fact that he or she is affected by the environment lie or she lived and worked in. To block or balance the process ...
    • Aircraft sensor fault detection based on unknown input observers 

      Çetin, Ömer; Kıyak, Emre; Kahvecioğlu, Ayşe (Emerald Group Publishing Limited, Howard House, Wagon Lane, Bingley Bd16 1Wa, W Yorkshire, England, 2008)
      Purpose - The purpose of this paper is to generate residuals which can be used to detect fault and isolate on a vertical takeoff and landing (VIOL) aircraft dynamic model. Design/methodology/approach - In the proposed ...
    • An FPGA implementation of 2-D CNN Gabor-type filter 

      Saatçı, Ertuğrul; Cesur, Evren; Tavşanoğlu, Vedat; Kale, İzzet (IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2007)
      A field programmable gate array (FPGA) implementation of the Gabor-type filter is presented. The implementation uses the forward Euler approximation with optimal step size to solve the CNN cell-state equation. The FPGA is ...
    • Analysis of brain connectivity changes after propofol injection by generalized partial directed coherence 

      Gürkan, Güray; Akan, Aydın; Özkan Seyhan, Tülay (Academic Press Inc Elsevier Science, 525 B St, Ste 1900, San Diego, Ca 92101-4495 Usa, 2014)
      In this paper we present a method for the analysis of multichannel EEG by using Generalized Partial Directed Coherence (gPDC) to extract cortical connectivity changes under anesthesia. 15 channel EEG data were recorded ...
    • Application of Stockwell Coherence To Prediction Of Alertness Under Anaesthesia 

      Gürkan, Güray; Akan, Aydın; Demiralp, Tamer (Brno Univ Technology Vut Press, Purkynova 118, Brno 61200, Czech Republic, 2010)
      In this paper, we represent an application of Stockwell Coherence to scalp EEG signals under anesthesia. By the analysis of overlapping, stationary data segments, we obtained the time-varying Stockwell coherence, which ...
    • Bandpass sampling of multiband signals by using geometric approach 

      Saatçı, Esra; Saatçı, Ertuğrul; Akan, Aydın (IEEE, 345 E 47th St, New York, Ny 10017 USA, 2017)
      This paper presents a simple and fast approach to f nd a minimum sampling frequency for multi-band signals. Instead of neighbor and boundary conditions, constraints on the sampling frequency were derived by using the ...
    • Bayesian Compressive Sensing for Ultra-Wideband Channel Models 

      Özgör, Mehmet; Erküçük, Serhat; Çırpan, Hakan Ali (Ieee, 345 E 47Th St, New York, Ny 10017 Usa, 2012-07-03)
      Considering the sparse structure of ultra-wideband (UWB) channels, compressive sensing (CS) is suitable for UWB channel estimation. Among various implementations of CS, the inclusion of Bayesian framework has shown potential ...
    • Capacitor coupled converter (C3) for high power DC conversion 

      Ehsani, Morteza; Bilgiç, Mehmet Oruç; Khan, S.; Laskai, L.; Jeong, Seung-Gi (IEEE, 1995)
      The bang-bang controlled capacitor coupled converter (C<sup>3</sup>) is described in this paper. Due to the converter's inherent commutating property, the C<sup>3</sup> can accommodate thyristors as well as high-power gate ...
    • Channel Estimation for SM Systems over Time-Varying Rayleigh Fading Channels 

      Acar, Yusuf; Doğan, Hakan; Panayırcı, Erdal (IEEE, 345 E 47Th St, New York, Ny 10017 Usa, 2014)
      This paper is concerned with the challenging and timely problem of channel estimation for spatial modulated systems in the presence of time varying channels. Recently, estimation of channel state information for SM systems ...
    • Channel estimation for spatial modulation orthogonal frequency division multiplexing systems 

      Acar, Yusuf; Doğan, Hakan; Panayırcı, Erdal (IEEE, 345 E 47th St, New York, Ny 10017 USA, 2015-10-14)
      A combination of spatial modulation and orthogonal frequency division multiplexing (SM-OFDM) has been recently proposed for multicarrier systems while assuming the perfect channel state information (P-CSI) available at the ...
    • Correlation analysis of respiratory signals by using parallel coordinate plots 

      Saatçı, Esra (Elsevier Ireland Ltd, Elsevier House, Brookvale Plaza, East Park Shannon, Co, Clare, 00000, Ireland, 2018-01)
      Background and objectives: The understanding of the bonds and the relationships between the respiratory signals, i.e. the airflow, the mouth pressure, the relative temperature and the relative humidity during breathing may ...
    • Data detection based iterative channel estimation for coded SM-OFDM systems 

      Acar, Yusuf; Leblebici, Mehmet Merih; Doğan, Hakan; Panayırcı, Erdal (IEEE, 345 E 47Th St, New York, Ny 10017 USA, 2016)
      The combination of spatial modulation (SM) and orthogonal frequency division multiplexing (OFDM) as SM-OFDM is a recently proposed efficient modulation scheme with exploiting the index of transmit antenna to convey information ...
    • Design and realization of multi-channel wireless data acquisition system for laboratory-scale experiments on structural health monitoring 

      Gürkan, Koray; Gürkan, Güray; Dindar, Ahmet Anıl (Jve Int Ltd, Geliu Ratas 15 A, Kaunas, Lt-50282, Lithuania, 2018-03)
      In this paper, we present the design steps of a low cost multi-channel accelerometer system accompanied with an open-source data acquisition software. Hardware part of the system, named KACC, is composed of battery powered ...
    • Determination of theminimum sampling frequency in bandpass sampling by geometric approach and geometric programming 

      Saatçı, Esra; Saatçı, Ertuğrul (Springer, 2018-10)
      This paper presents a simple and fast approach to find a minimum sampling frequency for multi-band signals. Instead of neighbor and boundary conditions, constraints on the sampling frequency were derived by using the ...