تقدم هذه الأطروحة برنامج حاسوبي تفاعلي لتصميم خطوط النقل الكهربائي ثلاثية الأطوار باستخدام MATLAB. يمكن استخدام هذا البرنامج كوسيلة تعليمية داخل وخارج الفصل الدراسي لشرح أساسيات و ضواهر خطوط النقل الكهربائي.تتناول اغلب الكتب المرجعية المتاحة حاليا لمحتويات خطوط النقل التصميم الكهربائي فقط ولهذا السبب فان اغلب طلاب هندسة القوى الكهربائية يتخرجون من الجامعة وبدون دراية كافية عن الجزء المتعلق بالتصميم الميكانيكي والمتمثل في حسابات ارتخاء الخط والشد على الأبراج وزيادة وزن الموصلات نتيجة لتجمع الثلوج أو زيادة سرعة الرياح وتغير كل من ذلك مع درجات حرارة الجو. كما أن هذا البرنامج مزود ببعض البرامج الإضافية الأخرى والمتمثلة في حسابات قيم سعات ومتحاثات خطوط النقل أخدا في الاعتبار السلك الأرضي. كما أن هذا البرنامج يمكن استخدامه لمعرفة المعاوقات والسعات التسلسلية ( الصفرية والموجبة).وقد تم تزويد هدا البرنامج بقاعدة بيانات تحتوى على مواصفات شاملة للعديد من الموصلات المستخدمة في خطوط النقل الكهربائي.كما أن هذا البرنامج يمكن استخدامه لحسابات شدة المجال الكهربائي حول الموصلات وبالقرب من الأرض. Abstract This thesis presents an interactive computer program for three phase overhead transmission line design using MATALB. This program can be used as a self learning tool to understand the course material offered in class and to enhance students understanding to the three phase transmission line subject. This first course is normally given as a core course to all electrical engineering students. Most of the existing text books in power system analysis nowadays cover the Electrical line design only and describe the line performance very efficiently with very few power text books which treat the mechanical line design part. Therefore electrical engineering students with power engineering major are often graduated from school without having sufficient background concerning the mechanical line design features such as; line sag, the mechanical tension at the tower and the conductor sag due to temperature variations or line loading, conductor thermal limit ….etc. The program is also equipped with an additional feature to compute the line sequence impedances and the line sequence capacitances. Other line features are also provided in this package such as ; thermal limit line calculation, line voltage stability phenomena and the electrical field calculation due to transmission line. Therefore using this program the students will then be able to compute the line sequence parameters for both the single circuit as well as the double circuit tower configuration, with and without ground wire. The package has been also provided with a built in data base library to most of the available power line conductors. Therefore power engineering students will then be able to understand the transmission line course contents in more depth and to use the other supporting program modules as a self learning tool for line design and line modeling performance.
.سالم مسعود الكردي (2010)

The introduction of new services with different bandwidth requirements, e.g., data and multimedia, to cellular mobile radio networks makes many of the traditional mechanisms unusable or less efficient. The call admission control and the handover handling are the most sensitive issues to this extension. The performance of all services including the traditional voice and the new services can be dramatically effected if no appropriate schemes are used. In this research work, a new call admission and handover handling schemes for a cellular mobile network that offers two service types: voice and data is proposed. The data connections are assumed to be transmitted at different data rates, which are an integer multiple to that of one traffic channels, which are full speed(Cd1) & reduced peed(Cd2). In order to reduce the handover failure probability of data connections, the data mobile terminals (MT) are assumed to have the capability of transmitting at two different data rates. If the handover request can not be satisfied by the base station of the destination cell due to unavailable free traffic channels, the data mobile terminals tries with a lower data rate. The handover fails if the network is incapable on providing the minimum data rate at which the mobile terminal can transmit. The reduced data connection or data rate can be speeded up to full data rate or full speed as soon as enough bandwidth is available. The effect of different traffic and configuration parameters on the performance of the different models for two cell model with equal input traffic intensity, two cell model with different input traffic intensity, and two cell model with equal input traffic intensity considering the congestion rate for the highway model are studied as the models of this research. These models are built using MOSEL language (Modeling Specification and Evaluation Language). The results of investigating the mentioned models showed the effect of the handover, and speed of data on these different models.
W. ABUGHRES(1-2000)

Abstract In wireless communication systems the data rate, capacity, coverage, and spectral efficiency; can be enhanced with multi-carrier transmission and multi-antenna, then the overall wireless communication system performance is greatly enhanced by combining OFDM and MIMO schemes, MIMO helps in increasing the throughput where as OFDM spreading out the frequency selective fading channel over many symbols. In this thesis evaluating performance of the system depends on both link and system levels, where the measure of performance is represented in the throughput, cell radius and the effective signal to interference plus noise ratio (SINR). It also depends on the employed capacity criterion and it takes into account the impact of adaptive modulation and coding. the worked scenarios start from a link level extending to a system level in 3GPP LTE. To achieve the above a number of tasks followed by observations are carried out. They start by analysis of the equations and a Matlab program is written to calculate the cell edge throughput, cell coverage and DL capacity. After the programs implementation, the multi antenna transmission effect is noted on the arrival throughput when taking into account the modulation technique. When increasing the order of the antenna and the throughput is also increased, but it must be traded off with the probability of error; Coverage has also improved by decreasing the order of the modulation technique. For the system level with different traffic, the overall throughput of the system and the capacity of the network are determined by the number of resource blocks (RBs). These RBs depend on the bit rate of the service and bit rate for each RB. The adopted scenarios in this thesis start from link to system, where the features are represented in a flexible base station and user configurations, channel modeling with path loss, user mobility, also at different transmitter and receiver (MIMO). The approaches are useful in single user and multi-user MIMO, then all of the above can be standardized by metrics: capacity, throughput, spectral efficiency, user QoS etc. Finally thesis conclusion and some future work as an extension of this work are presented.
احمد محمد التانزفتى (2013)