Elektrik Elektronik Mühendisliği Bölümü: Recent submissions

Now showing items 181-200 of 237

Structure parameter of anisotropic atmospheric turbulence expressed in terms of anisotropic factors and oceanic turbulence parameters

Baykal, Yahya; Ata, Yalçın; Gökçe, Muhsin Caner (Optical Soc Amer, 2019-01-10)

The structure parameter of the anisotropic atmospheric turbulence is expressed in terms of atmospheric, oceanic anisotropic factors in x and y directions, and the oceanic turbulence parameters, which are the wavelength, ...
Scintillation index of optical spherical wave propagating through biological tissue

Baykal, Yahya; Arpalı, Çağlar; Altay Arpalı, Serap (Taylor&Francis, 2017)

Effects of the tissue turbulence on the propagation of an optical spherical wave are analysed. For this purpose, scintillation index of an optical spherical wave which is propagating in a soft tissue is formulated and ...
Error performance of optical wireless communication systems exercising BPSK subcarrier intensity modulation in non-Kolmogorov turbulent atmosphere

Ata, Yalçın; Baykal, Yahya; Gökçe, Muhsin Caner (Elsevier Science BV, 2019-04-01)

Subcarrier intensity modulation (SIM) scheme is preferred due to efficient bandwidth usage superiority over other modulation techniques such as on-off keying (OOK), pulse position modulation (PPM). In this paper, we ...
Anisotropy effect on performance of PPM optical wireless oceanic communication links

Baykal, Yahya (Pergamon-Elsevier Science LTD, 2019-05)

The performance, quantified by the bit-error-rate (BER), of M-ary pulse position modulated (PPM) optical wireless oceanic communication (OWOC) link is investigated when such a link operates in anisotropic weak oceanic ...
Effect of strong atmospheric non-Kolmogorov turbulence on the M-ary PSK subcarrier intensity modulated free space optical communications system performance

Gökçe, Muhsin Caner; Ata, Yalçın; Baykal, Yahya (Optical Soc Amer, 2019-05-01)

Atmospheric turbulence is one of the significant phenomena that degrades the free space optical (FSO) communications system performance, and thus designers need to define the requirements related to turbulence and optimize ...
M-ary phase shift keying-subcarrier intensity modulation performance in strong oceanic turbulence

Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın (Spie-Soc Photo-Optical Instrumentation Engineers, 2019-05)

In strong oceanic turbulence, we investigate the bit error rate (BER) performance of underwater wireless optical communication links by employing phase shift keying subcarrier intensity modulated Gaussian laser beam at the ...
The analysis of anisotropic the non-Kolmogorov turbulence effect on asymmetrical Gaussian beam propagation in a marine atmosphere

Ata, Yalçın; Baykal, Yahya (IOP Publishing LTD, 2019-07)

The variations of the scintillation index of an asymmetrical Gaussian beam are investigated when the beam propagates in anisotropic non-Kolmogorov marine atmospheric turbulence. The results indicate that the scintillation ...
Modification of a plasmonic nanoparticle lifetime by coupled quantum dots

Salmanogli, Ahmad (Amer Physical Soc, 2019-07-10)

In this study, the interaction between a plasmonic nanoparticle and coupled quantum dots is investigated to identify how the coupled particles can manipulate the plasmonic nanoparticle decay rate. This subject is very ...
Off-axis average transmittance and beam spread of a partially coherent flat-topped beam in a turbulent underwater medium

Keskin, Aysan; Baykal, Yahya (Optical Soc Amer, 2019-08-01)

The effects of oceanic turbulence on the off-axis optical transmittance and beam spread are examined when a partially coherent flat-topped beam wave propagates in an underwater medium. To observe the oceanic turbulence ...
Multimode laser beam scintillations in strong atmospheric turbulence

Baykal, Yahya; Gerçekçioğlu, Hamza (Springer Heidelberg, 2019-08)

Multimode laser beam scintillation index is formulated at the origin of the receiver plane (on-axis) in strong atmospheric turbulence using the modified Rytov method. Variations of the scintillation index against the ...
Anisotropy effect on performance of subcarrier intensity modulated binary phase shift keying optical wireless communication links in weakly turbulent underwater channel

Baykal, Yahya; Gökçe, Muhsin Caner; Ata, Yalçın (Taylor&Francis LTD, 2019-10)

The effect of the anisotropy on the bit-error-rate (BER) performance of subcarrier intensity modulated (SIM) binary phase shift keying (BPSK) optical wireless communication (OWC) links operating in weakly turbulent underwater ...
Application of normal wiggly dual hesitant fuzzy sets to site selection for hydrogen underground storage

Narayanamoorthy, Samayan; Ramya, L.; Baleanu, Dumitru; Kureethara, Joseph Varghese; Annapoorani, V. (Pergamon-Elsevier Science LTD, 2019-11-05)

The hesitant fuzzy set is a mathematical tool to express multiple values in decision making. If they could not give a resolution, it is important to give priority and importance to a number of different values. Here, we ...
Average channel capacity in anisotropic atmospheric non-Kolmogorov turbulent medium

Ata, Yalçın; Baykal, Yahya; Gökçe, Muhsin Caner (Elsevier, 2019-11-15)

The average channel capacity of a free space optical (FSO) communication system running an intensity modulated Gaussian beam is examined in anisotropic non-Kolmogorov atmospheric weak turbulence based on Rytov variance. ...
Performance analysis of M-ary pulse position modulation in strong oceanic turbulence

Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın (Elsevier Science Bv, 2018-11-15)

In this paper, we consider an underwater wireless optical communication (UWOC) system which consists of an M-ary pulse position modulated (PPM) Gaussian optical beam at the transmitter and an avalanche photodiode (APD) at ...
Anisotropy effect on multi-Gaussian beam propagation in turbulent ocean

Ata, Yalçın; Baykal, Yahya (Chinese Laser Press, 2018-08-10)

Average transmittance of multi-Gaussian (flat-topped and annular) optical beams in an anisotropic turbulent ocean is examined analytically based on the extended Huygens-Fresnel principle. Transmittance variations depending ...
Signal-to-noise ratio reduction due to oceanic turbulence in oceanic wireless optical communication links

Baykal, Yahya (Elsevier Science Bv, 2018-11-15)

The effect of oceanic turbulence on the signal-to-noise ratio (SNR) at the receiver of an oceanic wireless optical communication (OWOC) link is studied. To quantify such effect, the metric employed is the reduction in the ...
M-ary pulse position modulation performance in non-Kolmogorov turbulent atmosphere

Ata, Yalçın; Baykal, Yahya; Gökçe, Muhsin Caner (Optical Soc Amer, 2018-08-20)

The performance of atmospheric optical wireless communication systems in terms of the bit error rate (BER) is investigated when a Gaussian laser beam propagating in non-Kolmogorov turbulence is M-ary pulse-position-modulated ...
Bit error rate of pulse position modulated optical wireless communication links in oceanic turbulence

Baykal, Yahya (Optical Soc Amer, 2018-09-01)

The upper bound of the average bit error rate (BER) of a pulse position modulated (PPM) optical wireless communication (OWC) link operating in oceanic turbulence is formulated. BER variations against the changes in the ...
Propagation of a radially polarized twisted Gaussian Schell-model beam in turbulent atmosphere

Peng, Xiaofeng; Liu, Lin; Yu, Jiayi; Liu, Xianlong; Cai, Yangjian; Baykal, Yahya; Li, Wei (IOP Publishing Ltd, 2016-12)

Propagation properties of a scalar twisted Gaussian Schell-model (TGSM) beam in turbulent atmosphere has been studied in detail. In this paper, we explore the propagation properties of a radially polarized TGSM beam in ...
A novel method to solve 2nd order neumann type boundary value problems in electrostatics

Şener, Göker (Applied Computational Electromagnetics Soc., 2017-04)

In this paper, the numerical method of nonpolynomial spline approximation is used to solve 2nd order Neumann type boundary value problems (bvp's) in electrostatics. This new approach provides more accurate results than the ...

Now showing items 181-200 of 237

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