ملخص الدراسة: Orthogonal frequency division multiplexing (OFDM) has quickly gained its attraction in optical communications that are evolving towards software-enhanced optical transmissions. Coherent optical OFDM (CO-OFDM) takes advantage of software capabilities of electronic digital signal processing (DSP) to perform sophisticated operations and has demonstrated its easiness of realizing high spectral efficiency and combating various distortions […]

ملخص الدراسة: With growth of internet IPv4 address will run out soon. So the need of new IP protocol is indispensable. IPv6 with 128-bit address space is developed and maintain the support of IPv4 protocols with some upgrades such as BGP, OSPF and ICMP. ICMP protocol used for error reporting, neighbor discovering and other functions […]

ملخص الدراسة: Identity federation is a technology which enables the identity information to be trustily transferred across autonomous security domains. Shibboleth Federation is considered to trust logging process between different web educational resources, Fully Global log-out is not addressed by Shibboleth. In this thesis, we address Fully Global Log-out with a cached version of content […]

ملخص الدراسة: Fifth generation (5G) is the next major phase of mobile telecommunications standards beyond the current 4G, which will operate at millimeter-wave frequency band. In any wireless device, the performance of radio communications depends on the design of an efficient antenna. This thesis presents designs for microstrip antennas (single element and arrays at 28 […]

ملخص الدراسة: توثيق المرجعي (APA)

ملخص الدراسة: A microstrip antenna is considerable narrowband antenna and a method to increase its bandwidth as well as adding filtering property is studied here. In this research three models are developed for 2.4 GHz band applications using filtering antenna concept that increases the bandwidth of the antenna and allows it to work as a […]

ملخص الدراسة: توثيق المرجعي (APA)

ملخص الدراسة: This work presents a design and simulated results for 4×4 butler matrix with 4 inset fed patch antennas for anti-collision radar at 24GHz. The Butler matrix is used as a beam-forming network that allows producing orthogonal beams that can be steered in different directions. The butler matrix consists of 4 couplers, 2 phase […]

ملخص الدراسة: Multiple input multiple output (MIMO) techniques are one of the most important technologies in the 4th generation wireless systems, and will have a key role in meeting the requirements of 5G. Wireless relaying networks (WRNs) have been emerged to avoid the limitations of MIMO by its potential that attains the performance gains of […]

ملخص الدراسة: The next generation cellular wireless network aims to efficiently deploy low cost and low power cellular base station in the subscriber’s indoor environment. Also, one of the effective techniques of improving the coverage and enhancing the capacity and data rate in cellular networks is to reduce the cell size and transmission distances. Therefore, […]