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Effects of type of incidence on the second and fourth order moment parameters evaluated in turbulent atmosphere

Baykal, Yahya Kemal (2010)

Using a general type incidence, the second and fourth order moments are formulated in atmospheric turbulence. Received field and intensity correlations are evaluated and the behaviour of these correlations are compared for ...

Effects of ant colony and fastest path routing algorithms on performance improvement of novel cognitive methods

Preveze, Barbaros; Şafak, Aysel (2010)

This paper demonstrates the usage of novel cognitive methods that improve the throughput of a WIMAX network by minimizing packet loss. The effects of the ant colony and fastest path routing algorithms on the throughput are ...

Effects of adaptive optics on bit error rate of M-ary PPM oceanic optical wireless communication systems with aperture averaging in strong turbulence

Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın (2021-11)

Scintillation is the result of oceanic turbulence reducing the bit error rate (BER) performance of oceanic optical wireless communication (OWC) systems. The scintillation, also known as intensity fluctuations, occurs due ...

Design of quantum sensor to duplicate European Robins navigational system

Salmanoğli, Ahmad; Gökçen, Dinçer (2021-05-01)

In this article, we design a quantum device to duplicate the European Robins procedure to precisely deter-mine the migratory route. In the mentioned procedure, the important issue is the geomagnetic field effect on the ...

Design of a Novel Converter Between Li-Ion Battery and Supercapacitor to Feed Synthetic Aperture Radar Loads for Satellite Applications

Tülay, Gencer; İskender, İres (2020-12)

For satellite applications the active duty life of a satellite depends mainly on the battery lifespan. The charging or discharging current has an important role in useful life of batteries. For this purpose, the converters ...

Design and performance analysis of a three winding transformer used in solar system

Jahi, A.; İskender, İres (2021)

Due to the increasing of the fossil fuels prices in the past years and lack of these sources, all scientists encouraged to looking for the alternative energy sources. One of these energy sources is the renewable solar ...

BER performance ofM-ary pulse position modulated communication systems in anisotropic non-Kolmogorov turbulent atmosphere

Ata, Yalçın; Baykal, Yahya Kemal; Gökçe, Muhsin Caner (2022-03-04)

We investigated the effect of anisotropic non-Kolmogorov atmospheric turbulence on the performance of the optical wireless systems whenM-ary Pulse Position Modulation (PPM) is applied to a Gaussian beam. The performance ...

Beam wander of J (0)- and I (0)-Bessel Gaussian beams propagating in turbulent atmosphere

Çil, Celal Zaim; Eyyüboğlu, Halil Tanyer; Baykal, Yahya Kemal; Korotkova, O.; Cai, Y. (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 ...

Anisotropic non-Kolmogorov turbulence effect on transmittance of multi-Gaussian beam

Ata, Yalçın; Baykal, Yahya (2020-01-02)

The effect of anisotropic non-Kolmogorov turbulent atmosphere on multi-Gaussian beam is investigated and the results are presented against different beam and medium parameters. Results show that anisotropy increases the ...

Analysis of Quantum Radar Cross-Section by Canonical Quantization Method (Full Quantum Theory)

Salmanogli, Ahmad; Gökçen, Dinçer (2020)

This article investigates the difference between two quantum-based theories to calculate the radar cross-section (RCS). Quantum radar cross-section (QRCS) has been commonly analyzed using the dipole approximation method, ...

Adaptive optics effect on performance of BPSK-SIM oceanic optical wireless communication systems with aperture averaging in weak turbulence

Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın (2020-11)

Turbulence-induced wavefront deformations cause the irradiance of an optical signal to fluctuate resulting a in serious degradation in the bit-error-rate (BER) performance of optical wireless communication (OWC) system. ...

A data collection system design for hand gestures

Akan, E.; Akagündüz, E.; Uslu, I. B. (2021-08)

In this study, we aim at designing a smart glove, which consists of different inertial sensors and an EMG sensor and developing a human-machine interaction application by pre-processing and fusing these different sensory ...

Optoelectronic based Quantum Radar: Entanglement Sustainability Improving at High Temperature

Salmanoğli, Ahmad; Gökçen, Dinçer (2020)

High-gain low-profile rectangular microstrip patch antenna with Yagi elements

Şener, Göker (2020-05-23)

This paper presents a novel high gain rectangular microstrip patch antenna (RMSA) with vertically placed Yagi elements. The antenna is fed by a coaxial probe to excite TM01 fundamental waves at 2.4GHz, which is suitable ...

Comparison of single channel indices for U-Net based segmentation of vegetation in satellite images

Ülkü, İrem; Barmpoutis, Panagiotis; Stathaki, Tania; Akagündüz, Erdem (2020)

A Hybrid Framework for Matching Printing Design Files to Product Photos

Kaplan, Alper; Akagündüz, Erdem (2020)

We propose a real-time image matching framework, which is hybrid in the sense that it uses both hand-crafted features and deep features obtained from a well-tuned deep convolutional network. The matching problem, which we ...

Filter design for small target detection on infrared imagery using normalized-cross-correlation layer

Demir, H. Seçkin; Akagündüz, Erdem (2020)

In this paper, we introduce a machine learning approach to the problem of infrared small target detection filter design. For this purpose, similar to a convolutional layer of a neural network, the normalized-cross-correlational ...

A Novel Method For Performance Improvement of Slow Start Congestion Control Method In Packet Switched Networks

Preveze, Barbaros (2019)

By the introduction of all IP networks with the smart homes, smart phones, car multimedia systems wearable technologies and IP TV’s, the number of internet related devices and the number of applications have increased. ...

Dynamic Optımızatıon of Image Brıgthness Level With Optimal Gamma Value Assessment (OGVA) Method

Preveze, Barbaros (2020)

In this study, the proposed Optimum Gamma Value Assignment (OGVA) method is intended to dynamically optimize the image intensity level in non-desired images due to undesired light levels. For this purpose, it is aimed to ...

Improvement of Underlay Cooperative Cognitive Networks Bandwidth Efficiency under Interference and Power Constraints

Al-Mishmish, Hameed R. M.; Preveze, Barbaros; Alkhayyat, Ahmed (2019-11-30)

The definition of the bandwidth efficiency (BE) of cognitive cooperative network (CCN) is the ratio between a number of the licensed slot(s) or sub-channel(s) used by the unlicensed users to transmit a single data packet ...

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