Telecommunications science

20190304-01
Comparative analysis of the possibilities of building a decentralized control plane of a Software Defined Networks
Jordan Raychev, Diyana Kinaneva, Georgi Hristov, Plamen Zahariev

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The objective of the current paper is to be conducted a comparative analysis of the available possibilities for building a decentralized controller plane of a Software Defined Network (SDN). The SDN networks are an emerging ...  read more

20190102-03
Algorithm for software realization of video observation system by means of remote control
Lilijana Docheva, Ivo Dochev, Maria Pavlova

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The aim in the article is to present a software realization of video observation system by means of remote control. The system consists of two main components. One of them is a quad-copter and the other is the development ...  read more

20190102-02
On the spectra of scale-free and small-world networks
Mircho Mirchev

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This paper reviews the most commonly used models of complex systems and networks -Erdos -Renyi, Watts-Strogatz and Barabasi-Albert models. These models address different sets of properties and phenomena of real-life networks. ...  read more

20190102-01
Definitions for disruptive innovation in telecommunication technologies
Tsvetoslava Kyoseva

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Every industry at a given moment reaches its end of development, a tipping point where the saturation of the market by products, services and technologies is inevitable. This article analyzes the term innovation and its specific ...  read more

20181112-05
In-flight sensor system for collecting flight information and providing flight safety of unmanned aerial system
Krume Andreev, Rumen Arnaudov, Ivo Dochev

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In the last decade there has been a rapid development of unmanned aerial aviation and various solutions are sought for gathering information from difficult access points or in cases where there is a risk to operators and technology. ...  read more

20181112-06
A remote controlled system implementation for object video monitoring
Ivo Dochev, Liljana Docheva, Maria Pavlova

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In the current article a solution of the problem with information taking from difficult to reach and dangerous earth places is described. The robots will be very useful in this case. In the article hardware part researching ...  read more

20140304-06
A functional model extension of OMA device management
Ivaylo I. Atanasov, Evelina N. Pencheva

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Machine-to-Machine (M2M) communications allow interworking of smart objects such as sensors, actuators and monitors, and development of innovative applications. Remote entity management provides means of managing M2M device ...  read more

20140708-07
40 years an anechoic chamber for automatic antenna measurements in Department of Communication Engineering and Technologies at Technical University of Varna
Georgi T. Chervenkov, Lyubomir P. Kamburov, Georgi S. Kirov

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The creation and development of the anechoic chamber for automatic antenna measurements in the Department of Communication Engineering and Technologies at Technical University of Varna since mid 1970’s to now days is described ...  read more

20140708-06
Three element broadband acoustic array with constant array factor
Peter S. Apostolov, Georgi P. Georgiev

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In the paper a problem of spatial signals filtration with high selectivity is discussed. To approximate the ideal array factor – Kronecker-δ, approximation method of compressed cosines is used. The approximation with third-degree ...  read more

20140910-04
Sensitivity investigations of second-order bandpass/bandstop filter sections
Maria Nenova

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Three recursive tunable biquadratic sections are studied and compared in this paper. The transfer function sensitivities and the impact of the quantization process of the multiplier coefficients on the behavior of the structures ...  read more