DSpace@Çankaya

Yazar "Çankaya Üniversitesi, Mühendislik Fakültesi, Elektronik ve Haberleşme Mühendisliği" için Elektronik ve Haberleşme Mühendisliği Bölümü Yayın Koleksiyonu listeleme

Yazar "Çankaya Üniversitesi, Mühendislik Fakültesi, Elektronik ve Haberleşme Mühendisliği" için Elektronik ve Haberleşme Mühendisliği Bölümü Yayın Koleksiyonu listeleme

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  • Beam wander of J (0)- and I (0)-Bessel Gaussian beams propagating in turbulent atmosphere 
    Çil, Celal Zaim; Eyyuboğlu, Halil T.; Baykal, Yahya; Korotkova, Olga; Cai, Yangjian (Springer, 2010-01)
    Root mean square (rms) beam wander of J (0)-Bessel Gaussian and I (0)-Bessel Gaussian beams, normalized by the rms beam wander of the fundamental Gaussian beam, is evaluated in atmospheric turbulence. Our formulation is ...
  • BER of annular and flat-topped beams in non-Kolmogorov weak turbulence 
    Gerçekçioğlu, Hamza; Baykal, Yahya (Elsevier Science Bv, 2013-01-01)
    The average bit error rate (BER) of multi-Gaussian beams in non-Kolmogorov weak turbulence is examined. For each specific incidence of annular and flat-topped optical beam, a power law of non-Kolmogorov spectrum is found ...
  • BER of annular and flat-topped beams in strong turbulence 
    Gerçekçioğlu, Hamza; Baykal, Yahya (Elsevier Science Bv, 2013-07-01)
    The average bit error rate (< BER >) of annular and flat-topped beams are evaluated in strong turbulence. In this respect, our earlier results on the scintillation indices obtained by the unified Rytov method are employed ...
  • Ber of Annular Beams in Strong Turbulence 
    Gerçekçioğlu, Hamza; Baykal, Yahya; Eyyuboğlu, Halil T. (2010)
    Bit error rate (BER) of annular beams is found in strong turbulence. Examining effects of beam and medium parameters on BER reveals that annular beams become favorable in stronger turbulence and at smaller focal lengths.
  • Bit error rate analysis of Gaussian, annular Gaussian, cos Gaussian, and cosh Gaussian beams with the help of random phase screens 
    Eyyuboğlu, Halil T. (Optical Soc Amer, 2014-06-10)
    Using the random phase screen approach, we carry out a simulation analysis of the probability of error performance of Gaussian, annular Gaussian, cos Gaussian, and cosh Gaussian beams. In our scenario, these beams are ...
  • Bit error rates for general beams 
    Altay Arpalı, Serap; Eyyuboğlu, Halil T.; Baykal, Yahya (Optical Soc Amer, 2008-11-10)
    In order to analyze the effect of beam type on free space optical communication systems, bit error rate (BER) values versus signal-to-noise ratio (SNR) are calculated for zero order and higher order general beam types, ...
  • Boundary diffraction wave theory of junctions between two surfaces with different face impedances 
    Umul, Yusuf Ziya (Elsevier Science Ltd, 2012-07)
    The line integral of the boundary diffraction wave theory is derived for the diffraction process of waves by a junction between two surfaces with different face impedances. The exact solution of Maliuzhinets is used with ...
  • Boundary diffraction wave theory of resistive surfaces with edge discontinuities 
    Umul, Yusuf Ziya (Elsevier Science Bv, 2011-10-15)
    The line integral of the boundary diffraction wave theory is derived by considering the exact diffracted fields of a resistive half-plane. The line integral is generalized for arbitrary resistive surface with edge ...
  • Bounds for generalized gamma distributed fading channels 
    Gazi, Orhan (IEEE-Inst Electrical Electronics Engineers Inc, 2011-12)
    In this article, upper bounds for the outage probability and moment generating functions of the fading channels with alpha - mu distribution are derived. The proposed upper bound for the moment generating function is used ...
  • Changes of the centroid position of laser beams propagating through an optical system in turbulent atmosphere 
    Ji, Xiaoling; Baykal, Yahya; Jia, Xinhong (Elsevier Science Ltd, 2013-12-30)
    In this paper, the effects of atmospheric turbulence, initial field amplitude, optical system and thermal blooming on the centroid position of laser beams propagating through the atmosphere are studied in detail. With the ...
  • Channel Coding Theorem 
    Gazi, Orhan (Springer, 2018)
    In this chapter, we will discuss the channel coding theorem in details. Channel coding theorem can be accepted as a milestone in electronic communication field. For this reason, it is very critical for a communication ...
  • Closed form series solution of the diffraction problem of plane waves by an impedance half-plane 
    Umul, Yusuf Ziya (IOP Publishing Ltd, 2009-04)
    The scattering problem of plane waves by an impedance half-plane is solved by using the method of separation of variables, and a closed form series expression, which separately reduces to the cases of soft and hard ...
  • Cloud Computing Investigation for Cloud Computer Networks Using Cloudanalyst 
    Mezaal, Yaqeen S.; Madhi, H. H.; Abd, T.; Khaleel, S. K. (Little Lion Scientific, 2018-10)
    In this paper, the performances of load balancing algorithms; Round Robin, Equally Spread Current Execution, and Throttled, in two workload cases, normal and burst are investigated using CloudAnalyst simulator tool. The ...
  • Coherence length in non-Kolmogorov satellite links 
    Baykal, Yahya (Elsevier Science Bv, 2013-11-01)
    Behavior of the coherence length in non-Kolmogorov satellite links is investigated. Equivalent structure constants for non-Kolmogorov spectra are employed in order to make relevant comparisons for different non-Kolmogorov ...
  • Comment On 'Fringe Waves in An Impedance Half-Plane' 
    Başdemir, Hüsnü Deniz (Electromagnetics Acad, 2014)
  • Comparison of Diffraction Methods for Lunar Occultations 
    Umul, Yusuf Ziya (Elsevier GMBH, 2020-03)
    The only analytical method, which is used for the mathematical analysis of lunar occultations, is the Fresnel diffraction. The Fresnel integral is derived from the diffraction integral of Kirchhoff under some approximations. ...
  • Comparison of physical optics integral and exact solutions for cylinder problem 
    Umul, Yusuf Ziya; Yengel, Emre; Aydın, Ayhan (2003)
    The sound source composition of the urban sound environment varies depending on the geography and socio-cultural context. Current sound taxonomies in the literature categorize urban sound sources by their source types ...
  • Comparison of wave structure functions for intensity profiles 
    Eyyuboğlu, Halil T. (Springer, 2009-03)
    We give a list of available wave structure functions (WSFs) of a spherical wave, simultaneously providing some derivation details. The aim is to assess the impact of these WSFs on intensity profiles of various beams ...
  • 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 ...
  • Concept of area scintillation 
    Eyyuboğlu, Halil T. (Springer, 2009-08)
    Stemming from the results of our earlier investigations, the concept of area scintillation is introduced, which takes into account the intensity distribution over the receiver plane. In this context, the area scintillation ...