year 2015

20150102-full
Issue 1-2, 2015

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 50. No 1-2/2015
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20150102-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE

Seferin T. Mirtchev
Internet evolution, teletraffic and QoS: a survey of network traffic 2

Emil ...  read more

20150304-full
Issue 3-4, 2015

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 50. No 3-4/2015
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20150304-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE

Nikolay Krastanov
SSH keys exchange protocol using identity based encryption 2

Kiril M. Kassev
 ...  read more

20150102-07
Study of the elements of the photovoltaic system

In this paperwork has been made a study of the elements of an off-grid photovoltaic system for power supplying of telecommunication systems and telecommunication modules. The laboratory model is described. The bi-directional converter ...  read more

20150102-06
Model order reduction for a single machine infinite bus power system

The paper considers the problem of model order reduction for a single machine infinite bus power system by using a Legendre polynomials approximation based balanced residualization method. The model examines the small signal behavior ...  read more

20150102-05
Specialized controller for managment of industrial and consumer lighting

A lighting controller prototype is presented, which is intended to be used for lighting control in poultry farms, where a precise control of the lighting cycle and intensity is required. Such farms require 24 hours per day control of ...  read more

20150102-04
Recent trends and future developments of SCP-RPSC high altitude platform systems

A new technology for broadband wireless access to the fixed networks, named High Altitude Platform Systems (HAPS) is under development now as an effective solution of the “Last mile” communication problems. The application of the ...  read more

20150102-03
Narrow beamwidth antenna for DTH satellite television

https://eplThe exponential growth of channel number and services transmitted lead to exhaustion of existing satellite orbital positions, and traced the path for new regulations in an industry last regulated in the mid of 20-th century. ...  read more

20150102-02
A general concept and implementation of a DSP-based QAM digital modulator

The versatility of a Digital Signal Processor (DSP) can be used to implement easily various Quadrature Amplitude Modulation (QAM) tasks on a prototype board interconnected to the ADSP21061 EZ-KIT LITE DSP evaluation system extension ...  read more

20150102-01
Internet evolution, teletraffic and QoS: a survey of network traffic

Over the last decade, there is tremendous growth of the Internet traffic. The new applications can easily overload inter-domain links, disrupting the performance of other applications using the same network resources. This forces Internet ...  read more

20150304-07
Performance evaluation of Internet traffic by network measurements

A review of the main methods for measurement Internet traffic is made. Some of software platforms for network measurements are discussed. The reasons for the need of measurement and monitoring of traffic in IP-based networks are: optimization ...  read more