Now showing items 27-46 of 89

    • 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 ...
    • 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 ...
    • Estimation Of The Respiratory System Parameters 

      Sert, Görkem; Saatçı, Esra; Gürkan, Güray; Akan, Aydın (European Assoc Signal Speech & Image Processing-Eurasip, Po Box 74251, Kessariani, 151 10, Greece, 2011)
      In clinical respiratory studies, resistance and the lung compliance are two important respiratory parameters that are often measured by physicians. In this work, Respiratory signals (mask pressure, airway flow, and lung ...
    • Four-quadrant switch-mode gyrator 

      Dinçbakır, Cenk; Bilgiç, Mehmet Oruç (IEEE, 2008-05-23)
      A gyrator design based on an inductor coupled double bridge converter is presented. It is shown that this gyrator can operate in four-quadrant mode by using bi-directional MOS switches without the necessity of any feedback ...
    • Frequency estimation for monophonical music by using a modified VMD method 

      Öztürk Şimşek, Berrak; Akan, Aydın (IEEE, 345 E 47Th St, New York, Ny 10017 USA, 2017)
      In this paper, a new Variational Mode Decomposition (VMD) is introduced, and applied to the fundamental frequency estimation of monophonical Turkish maqam music. VMD is a method to decompose an input signal into an ensemble ...
    • Fundamental frequency estimation for heterophonical Turkish music by using VMD 

      Unknown author (IEEE, 345 E 47th St, New York, Ny 10017 USA, 2016)
      In this study, a new method is presented for the fundamental frequency estimation of heterophonical Turkish makam music recordings that include percusssive instrument by using Variational Mode Decomposition (VMD). VMD is ...
    • Fundamental Frequency Estimation for Monophonical Turkish Music by using VMD 

      Öztürk Şimşek, Berrak; Akan, Aydın; Bozkurt, Barış (IEEE, 345 E 47Th St, New York, Ny 10017 USA, 2015-05-16)
      In this study, a new method is presented for the fundamental frequency estimation of Turkish makam music recordings by using Variational Mode Decomposition (VMD). VMD is a method to decompose an input signal into an ensemble ...
    • Fuzzy logic based control of switched reluctance motor to reduce torque ripple 

      Derdiyok, A.; İnanç, N.; Özbulur, Veysel; Pastacı, Halit; Bilgiç, Mehmet Oruç (IEEE, 1997)
      This paper presents torque ripple reduction of a switched reluctance motor (SRM) by using a fuzzy speed controller. For this purpose, current control is applied with a fuzzy speed controller. The fuzzy controller adjusts ...
    • Generalised prefix for space-time block-coded orthogonal frequency division multiplexing wireless systems over correlated multiple-input multiple-output channels 

      Yıldız, Hakan; Acar, Yusuf; Cooklev, Todor; Doğan, Hakan (Inst Engineering Technology-Iet, Michael Faraday House Sıx Hılls Way Stevenage, Hertford Sg1 2Ay, England, 2014-06-12)
      Space-time block coding (STBC) orthogonal frequency division multiplexing (OFDM) is known to improve the reliability of broadband communication over wireless links. However, this technique suffers from a performance loss ...
    • Generalized Gauss Distribution Noise Model for Respiratory Parameter Estimation 

      Saatçı, Esra; Akan, Aydın (Ieee, 345 E 47Th St, New York, Ny 10017 Usa, 2009)
      In this studs, measurement noise is modelled as a Generalized Gauss Distribution and a new method is presented to estimate the model parameters. The estimator algorithm consists of the Kurtosis method, Kalman iterarions ...
    • Generalized Prefix Approach for Alamouti Coded OFDM Systems over Gaussian Channels Correlated in Space 

      Acar, Yusuf; Yıldız, Hakan; Cooklev, Todor; Doğan, Hakan (IEEE, 345 E 47Th St, New York, Ny 10017 Usa, 2014)
      In this ivorkt, generalized frelix (GP) lbr space time block coded orthogonal frequency division multiplexing (STBC-OFDM) systems is considered in the presence of correlated channel. The 2x2 STBC case, in practice, lead ...
    • Graphene actively Q-switched lasers 

      Li, Diao; Xue, Hui; Qi, Mei; Wang, Yadong; Akşimşek, Sinan; Chekurov, Nikolai; Kim, Wonjae; Li, Changfeng; Riikonen, Juha; Ye, Fangwei; Dai, Qing; Ren, Zhaoyu; Bai, Jintao; Hasan, Tawfique; Lipsanen, Harri; Sun, Zhipei (2017-05-05)
      Graphene electro-optic modulators (GEOMs) are emerging as a viable alternative to conventional material-based modulators mainly due to their broadband and ultrafast performance. These GEOMs with combined advantages of small ...
    • Graphene-MoS2-Metal Hybrid Structures for Plasmonic Biosensors 

      Akşimşek, Hüseyin Sinan; Jussila, Henri; Sun, Zhipei (Elsevier, 2018-12-01)
      Surface Plasmon Resonance (SPR) biosensors are widely used for real-time label-free detection in medical diagnostics, pharmaceutical researches and food safety. Although there is a growing interest in miniaturization of ...
    • Heart sound localization and reduction in tracheal sounds by gabor time-frequency masking 

      Saatçı, Esra; Akan, Aydın (Istanbul Unıv, Fac Engineering, Elektrik-Elektronik Mühendisliği Bölümü, Avcılar Kampüsü, İstanbul, 34320, Turkey, 2017)
      Respiratory sounds, i.e. tracheal and lung sounds, have been of great interest due to their diagnostic values as well as the potential of their use in the estimation of the respiratory dynamics (mainly airflow). Thus the ...