Elektronik ve Haberleşme Mühendisliği Bölümü Yayın Koleksiyonu: Recent submissions

  • SNR bounds of FSO links and its evaluation for selected beams 
    Eyyuboğlu, Halil T.; Bayraktar, Mert (Taylor&Francis Ltd, 2015)
    We formulate the signal-to-noise ratio (SNR) for free-space optical links. Upon inserting typical operating parameters, it is seen that SNR well approximates to the inverse of aperture averaged scintillation parameter. By ...
  • Complex degree of coherence and power moments of cylindrical sinc Gaussian beam 
    Eyyuboğlu, Halil T. (Elsevier Science Bv, 2015-12-01)
    Complex degree of coherence and power moment aspects of cylindrical sinc Gaussian beam are investigated. To do this, we have used the random phase screen approach. It is seen that on the source plane, cylindrical sinc ...
  • Entropy-Functional-Based Online Adaptive Decision Fusion Framework With Application to Wildfire Detection in Video 
    Günay, Osman; Töreyin, Behçet Uğur; Köse, Kıvanç; Çetin, Enis (IEEE-Inst Electrical Electronics Engineers Inc, 2012-05)
    In this paper, an entropy-functional-based online adaptive decision fusion (EADF) framework is developed for image analysis and computer vision applications. In this framework, it is assumed that the compound algorithm ...
  • Scintillation behavior of cos, cosh and annular Gaussian beams in non-Kolmogorov turbulence 
    Eyyuboğlu, Halil T. (Springer, 2012-08)
    For a non-Kolmogorov spectrum, scintillation aspects of cos, cosh and annular Gaussian beams are investigated. The appropriate mathematical formulation is developed, the derived scintillation index is evaluated and its ...
  • Laguerre-Gaussian beam scintillation on slant paths 
    Yüceer, Mehmet; Eyyuboğlu, Halil T. (Springer, 2012-11)
    Scintillation evaluations for Laguerre-Gaussian (LG) beams for slant paths are made using Rytov approximation. On- and off-axis scintillation is formulated and calculated up to several tens of kilometers of slant distances ...
  • Field correlations of annular beams in extremely strong turbulence 
    Baykal, Yahya; Cai, Yangjian; Ji, Xiaoling (Elsevier Science Bv, 2012-10-01)
    The field correlations of annular beams are formulated when the atmosphere assumes extremely strong turbulence. Thicker and larger ring sized annular beams are found to exhibit larger absolute field correlations. For the ...
  • Diffraction of plane waves by the interface between black and soft/hard semi-planes 
    Umul, Yusuf Ziya (Elsevier GMBH, 2012)
    A theory of scattering, based on the non-perturbation of the incident field, is developed for the black bodies. The method is applied to the diffraction problem of plane waves by an interface between the black and soft/hard ...
  • Effects of extremely strong turbulent medium on scintillations of partially coherent annular and flat-topped Gaussian beams 
    Öztan, Mehmet A.; Baykal, Yahya; Nakiboğlu, Cem (Elsevier Science Bv, 2012-03-15)
    Scintillation index of partially coherent annular and partially coherent flat-topped Gaussian beams propagating in horizontal links is found at the receiver origin when these beams propagate in extremely strong atmospheric ...
  • Propagation factor of partially coherent flat-topped beam array in free space and turbulent atmosphere 
    Yuan, Yangsheng; Cai, Yangjian; Eyyuboğlu, Halil T.; Baykal, Yahya; Chen, Jun (Elsevier Science Ltd, 2012-05)
    Analytical expressions for the propagation factor of partially coherent radial flat-topped (FT) beam array in free-space and turbulent atmosphere are derived. Our formulae can be applied to study the beam propagation factors ...
  • Wavelet based flickering flame detector using differential PIR sensors 
    Erden, Fatih; Töreyin, Behçet Uğur; Soyer, E.Birey; İnaç, İhsan; Günay, Osman; Köse, Kıvanç; Çetin, A. Enis (Elsevier Science LTD, 2012-10)
    A Pyro-electric Infrared (FIR) sensor based flame detection system is proposed using a Markovian decision algorithm. A differential PIR sensor is only sensitive to sudden temperature variations within its viewing range and ...
  • Effects of routing algorithms on novel throughput improvement of mobile ad hoc networks 
    Preveze, Barbaros; Şafak, Aysel (TUBİTAK Scientific&Technical Research Council Turkey, 2012)
    A cognitive method called most congested access first (MCAF), minimizing the packet loss ratio and improving the throughput of a multihop mobile WiMAX network, is proposed. MCAF combines both the time division multiple ...
  • Sinusoidal Gaussian beam field correlations 
    Baykal, Yahya (IOP Publishing Ltd, 2012-07)
    Field correlations of sinusoidal Gaussian beams are formulated in turbulence, and specifically cos Gaussian (cG) and cosh Gaussian (chG) beam field correlations are evaluated versus the diagonal length at the receiver ...
  • Prunable collision free random interleaver design 
    Gazi, Orhan (Springer, 2012-08)
    In this article we introduce a new collision free prunable random interleaver. The suggested interleaver is a joint structure involving rectangular and S-random interleaver. It comprises a general model for all kind of ...
  • Twist phase-induced reduction in scintillation of a partially coherent beam in turbulent atmosphere 
    Wang, Fei; Cai, Yangjian; Eyyuboğlu, Halil T.; Baykal, Yahya (Optical Soc Amer, 2012-01-15)
    The scintillation index of a Gaussian Schell-model beam with twist phase (i.e., twisted GSM beam) in weak turbulent atmosphere is formulated with the help of a tensor method. Variations of the scintillation index of a ...
  • Analysis of parallel decodable turbo codes 
    Gazi, Orhan (IEICE-INTS Electronics Information Communications Eng, 2012-05)
    Turbo codes suffer from high decoding latency which hinders their utilization in many communication systems. Parallel decodable turbo codes (PDTCs) are suitable for parallel decoding and hence have low latency. In this ...
  • Annular beam scintillations in non-Kolmogorov weak turbulence 
    Gerçekçioğlu, Hamza; Baykal, Yahya (Springer, 2012-03)
    In a weakly turbulent atmosphere governed by the non-Kolmogorov spectrum, the on-axis scintillation index is formulated and evaluated when the incidence is an annular Gaussian type. When the power law of the non-Kolmogorov ...
  • Non-Kolmogorov spectrum scintillation aspects of dark hollow and flat topped beams 
    Eyyuboğlu, Halil T.; Cai, Yangjian (Elsevier Science Bv, 2012-03-15)
    The scintillation aspects of dark hollow (DH) and fiat topped (FT) beams propagating in the turbulent atmosphere containing the non-Kolmogorov power spectrum are investigated. It is found that low scintillations will occur ...
  • Emission of matter waves by photons 
    Umul, Yusuf Ziya (Elsevier GMBH, 2012)
    A new hypothesis, based on the dualistic nature of matter and light, is proposed. The frequency shift of a photon creates an electron. The phenomenon is investigated according to the conservation laws of energy and momentum. ...
  • High-throughput screening of large volumes of whole blood using structured illumination and fluorescent on-chip imaging 
    Altay Arpalı, Serap; Arpalı, Çağlar; Coşkun, Ahmet F.; Chiang, Hsin-Hao; Özcan, Aydoğan (Royal Soc Chemistry, 2012)
    Undiluted blood samples are difficult to image in large volumes since blood constitutes a highly absorbing and scattering medium. As a result of this limitation, optical imaging of rare cells (e.g., circulating tumour ...
  • Hypergeometric Gaussian beam and its propagation in turbulence 
    Eyyuboğlu, Halil T.; Cai, Yangjian (Elsevier Science Bv, 2012-10-01)
    We study propagation characteristics of hypergeometric Gaussian beam in turbulence. In this context, we formulate the receiver plane intensity using extended Huygens-Fresnel integral. From the graphical results, it is seen ...