Electronic and Communication - Engineering

Abstract:The introduction of global system for mobile communication (GSM) air interface has undoubtedly created a new area in telecommunications. In view of its extensive use in real world applications, it is highly desirable to further investigate the performance of the GSM system under different operating conditions and environments. Furthermore, there is increasing interest in using high-level modulation to provide enhanced data rate for GSM evolution (EDGE). This thesis investigates the performance of both GSM and GSM/EDGE systems operating in Raleigh fading channel.

Abstract: Large antennas, such as required for radio astronomy or interplanetary probes, or ground stations of satellites, are engineering structures subject to gravity, wind, and thermal strains. The conditions especially the temperature gradient can cause undesired shape deformation, twists, and strain concentration in the structure, which can adversely affect the performance of antenna systems for both pointing and accuracy. In this thesis the thermal effects on the electrical characteristics of the reflector parabolic antenna are studied.

Abstract: Routers are intelligent devices that make connection between different networks possible. In addition, routers can perform several functions, including filtration and selection of the best path of packets movement. Routers must be configured efficiently in order to perform the above functions. In literature, two approaches have been distinguished for the configuration, namely; text mode and graphical mode approach. The present work is analyzing these two approaches and defines precisely their advantages and limitations.