Now showing items 19-38 of 97

    • 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 ...
    • Capacitively Coupled Converter (C3) for HighPower DC-DC Conversion 

      Ehsani, Mehrdad; Bilgiç, Mehmet Oruç; Khan, S. (1991-07)
      The capacitive coupled converter for high-power voltage source DC-DC applications is described. Its steady-state and dynamic behavior are analyzed theoretically and by computer simulation. Factors affecting its operation ...
    • 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 OFDM-IM systems 

      Acar, Yusuf; Aldırmaz Çolak, sultan; Başar, Ertuğrul (2019)
      Orthogonal frequency division multiplexing with index modulation (OFDM-IM) has been recently proposed to increase the spectral efficiency and improve the error performance of multicarrier communication systems. However, ...
    • 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 ...
    • Comparison of lung cancer detection algorithms 

      Günaydın, Özge; Günay, Melike; Şengel, Öznur (International Scientific Meeting on Electrical-Electronics and Biomedical Engineering and Computer Science (EBBT), 2019)
      Lung cancer is a kind of difficult to diagnose and dangerous cancer. It commonly causes death both men and women so fast accurate analysis of nodules is more important for treatment. Various methods have been used for ...
    • 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 ...
    • Cyclostationary analysis of respiratory signals with application of rate determination 

      Saatçi, Esra; Saatçi, Ertuğrul; Akan, Aydın (2019)
      Respiratory signals are periodic-like signals where the noisy periodic pattern repeats itself. Therefore, based on a stationarity assumption, autocorrelation function contains noisy cycles in time-lag with the same rate ...
    • 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 ...
    • Doku Analiz Yaklaşımına Dayanan Yeni Bir İris Tanıma Yöntemi 

      Gürkan, Güray; Akan, Aydın (IEEE, 2005)
      Bu çalışmada, iris yardımı ile kişi tanıma konusunda doku analizine dayalı yeni bir yöntem sunulmaktadır. İris görüntüleri bir ön işlemeden geçirildikten sonra doku analizine dayanan öznitelik vektörleri çıkarılmaktad ...
    • Dual Kalman Filter based State-Parameter Estimation in Linear Lung Models 

      Akan, Aydın; Saatçı, Esra (Springer, 233 Spring Street, New York, Ny 10013, United States, 2009)
      Time-domain approach to inverse modeling of respiratory system requires estimation of the parameters from the noisy observation. In this work, states and parameters of the linear lung models are estimated simultaneously ...
    • Dual-mode index modulation aided OFDM with generalized prefix 

      Acar, Yusuf; Aldırmaz Çolak, Sultan; Cooklev, Todor (2019-06)
      Recently, a dual-mode OFDM relying on index modulation (DM-OFDM-IM) has been introduced to increase the data rate of the conventional IM based OFDM techniques. However, such a mechanism has bit error rate performance loss ...
    • eal-Time Video Frame Differentiator Based on DDR3 SDRAM Memory Interface 

      Davutoğlu, Doğancan (2018-08)
      In this paper, design of a real-time video frame differentiator based on an external memory interface is proposed. Furthermore, implementation and simulation processes of the design is discussed. The proposed design is ...
    • EEG Sinyalinin Anestezi Sırasındaki Topografik ve Zamansal İzge Analizi 

      Gürkan, Güray; Uslu, Atilla; Cebeci, Bora; Erdoğan, Ezgi T.; Kaşıkçı, Itır; Seyhan, Tülay Ö.; Akan, Aydın; Demiralp, Tamer (IEEE, 2018)
      Bu çalışmada EEG sinyalinin anestezi altındaki izgesel değişimi, zamansal ve uzaysal olarak incelenmiştir. Bu amaçla kullanılan yöntemler arasında, günümüz anestezi derinliği takip cihazlarının da kullandığı bilinen ...
    • EOG Sinyalleri için Sınıflandırma Algoritmalarının Karşılaştırılması 

      Gürkan, Güray; Gürkan, Serkan; Uşaklı, Ali Bülent (IEEE, 2012)
      Bu bildiride, belirli göz hareketleri sonucu elde edilen elektrookülogram (EOG) sinyallerinin sınıflandırılması için Destek Vektör Makinesi (DVM) ve Yapay Sinir Ağı (YSA) yöntemleri karşılaştırılmaktadır. Göz hareketleri ...