Osman Cerezci

Osman Cerezci
Üsküdar University · department of electric and electronic engineering

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15
Publications
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22
Citations

Publications

Publications (15)
Article
Full-text available
In this work, the effect of oscillator phase noise on the bit error rate (BER) for high order QAM communication systems is analyzed. Two high frequency oscillators are designed, built and tested to get real phase noise data, and a BER simulation of a 1024 QAM signal through a super-heterodyne frequency down-converter is implemented using the measur...
Conference Paper
A method for achieving frequency synchronization between two distantly positioned high frequency oscillators is presented. The method is based on using GPS disciplined 10 MHz reference sine waves and phase locked dielectric resonator oscillators. In order to be able to measure the frequency difference between high frequency sources precisely, frequ...
Conference Paper
Full-text available
The anechoic chamber materials are based on specially shaped polyurethane materials doped with carbon materials such as carbon black and graphite and sometimes further supported with metal oxides and sintered metal oxide tiles. Because of the special shapes such as cones and pyramids used in anechoic chambers with high depth, the molding is very co...
Conference Paper
Full-text available
zet Kısa süreli Elektromanyetik Darbelerin (EMP) günümüzdeki önemi, uygulama alanları genişledikçe gitgide artmaktadır. Bu darbeler en çok savunma sektöründe kullanılmaktadır. Fakat bunların en bilinen uygulamasının, elektronik malzemelerin geçici, yüksek genlikli elektromanyetik darbelere karşı dayanıklılığını inceleme olduğunu söylemek mümkündür....
Article
The assessment of exposure level due to commonly used light sources needs specific attention in today's technology of lighting. The main reason behind this concern is that if exposure levels are not known, the biological results and necessary safety limits cannot be determined with accuracy. In this regard, this study has aimed to design, implement...
Article
Analyzing possible range of the induced thermal effects on biological tissues due to exposure with different light sources requires an extensive effort with experimental methods. This experimental study about thermal effects of light sources on living species is studied to provide reference data for scientists who utilize lighting sources in specif...
Conference Paper
In this study, the method to apply the Elman’s recurrent neural networks using resilient back propagation for harmonic detection is described. The feed forward neural networks are also used for comparison. The distorted wave including 5th, 7th, 11th, 13th harmonics were simulated and used for training of the neural networks. The distorted wave incl...
Conference Paper
In image analysis, image thresholding which is used for separating the object from the background is one of the most common application. For the preprocessing purposes of an image, thresholding is a necessary tool. Here, a new method based on minimizing measures of fuzziness is presented. Every pixel in the image and the averaged image have a membe...

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