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تعزيز اداء اتصالات الراديو عبر الليف احادي ومتعدد الطول الموجي بواسطة تقنية التضمين == Performance Enhancements of Single And Multi - Wavelength Radio Links Over Fiber By Modulation Technique

Author name: مصطفى عبد الهادي جليل

Supervisor name: عايد خلف محمد

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: University of Technology - Electrical Engineering Department - Electronic Engineering Branch

Language: English

University location: Baghdad

First pages:

Abstract: تم تطوير تكنولوجيا الراديو عبر الالياف منذ اواخر القرن العشرين، وتم استخدامها في مجموعة من التطبيقات لانظمة الاتصالات ويعتبر الراديو عبر الالياف هو الجيل المقبل من انظمة الاتصالات لما يمتاز به من العديد من المزايا مقارنة مع النظام التقليدي مع توهين منخفض | Radio - over - Fiber (RoF) technology has been developed since the late 20th century and has been used efficiently in a range of applications for communication systems. Radio over fiber system is the next generation of communication systems because it has many advantages compared with conventional system with low attenuation, enormous bandwidth of optical fiber, and extension of existing coverage and capacity. RoF system refers to the radio signals which are modulated with optical signal and transmitted over optical fiber link from Central Office (CO) to the Remote Nodes (RNs).In this work, several RoF systems have been designed and simulated with different modulation techniques using commercial software package called “Optisystem v.12”. Furthermore, these systems were compared with each other to check for better performance. These systems are presented as follows : The first system is RoF with Quadrature Phase Shift Keying (QPSK), 16 - Quadrature Amplitude Modulation (16 - QAM), and 64 - QAM schemes with and without OFDM technique. The simulation results of this system show that the Signal to Noise Ratio (SNR) for 64 - QAM - OFDM higher than SNR for QPSK, 4 - QAM and 16 - QAM with OFDM at 10 - 9 symbol error, after 50 km of SMF length without any amplification or compensation techniques. In addition, also SNR for 64 - QAM - OFDM higher than SNR for other techniques in this work after 160 km of fiber length.The second system is the RoF with QPSK and 16 - QAM schemes with Digital Signal Processing (DSP) unit in the receiver side. The simulation results of this system show that the Error Vector Magnitude (EVM) for QPSK scheme with DSP unit is 14.5% and 85.5% without DSP unit after 50 km of fiber length. Furthermore, the EVM for 16 - QAM with DSP unit is 7.5%, but the EVM for the same system without DSP unit is 91%. In addition, the EVM for QPSK with DSP equal to 11.5%, but the EVM for 16 - QAM with DSP equal to 9% after 160 km of fiber length.The third system is RoF system with two multiplexing techniques, 8×10 Gbps WDM - RoF system and 4×5 Gbps SCM - RoF system, have been simulated with 4 - QAM - OFDM, 16 - QAM - OFDM and 64 - QAM - OFDM schemes. The fourth system was to combine the techniques of wavelength division multiplexing (WDM) and subcarrier multiplexing (SCM) to increase the capacity of the system by 20×8 Gbps data rate. The simulation results show that the SCM - WDM - RoF with 64 - QAM gives high SNR compared with SCM - WDM - RoF system with other modulation schemes which have been used in this work.

تصميم ومحاكات منظومة استخدام الويب للمراقبة عن بعد في منظومات شركة مصافي الشمال في بيجي == Design And Simulation Of A Web-Based Monitoring System For The North Oil Refinery In Baiji

Author name: مسارع كريم محمود

Supervisor name: فوزي منير النعمة

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Doctorate

University: Al-Nahrain University - College Of Engineering

Language: English

University location: Baghdad

First pages:

بروتوكول توجيه المسار المتكيف ذات الطاقة الكفوءة في شبكات الاستشعار اللاسلكية == Energy Efficient Adaptive Routing Protocol For Wireless Sensor Networks

Author name: خالد وليد لويس

Supervisor name: Ghaida A. Al-Suhail | Turki Y. Abdalla

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: University Of Basrah - College Of Engineering - Department Of Electrical Engineering

Language: English

University location: Basrah

First pages:

تحليل وتصميم وتعزيز المفاتيح لشبكات الحواسيب الافتراضية == Analysis, Design And Enhancement Of Switches For Virtual Computer Networks

Author name: محمد بشير عبد الله محمد البزاز

Supervisor name: عبد الاله عبد الجبار

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Doctorate

University: University of Al Mosul - College Of Engineering - Department Of Electrical Engineering

Language: English

University location: Mosul

First pages:

تحليل اداء نظام الواي ماكس المتنقل (ذو المعيار العالمي IEEE 802.16e-2005) اعتمادا على الطبقة الفيزياوية == Performance Analysis Of Mobile WiMAX System (IEEE 802.16e - 2005 Standard) Based On Physical Layer

Author name: صفوان عماد عبد الفتاح الدباغ

Supervisor name: سامي محمد طاهر عبد الموجود

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Doctorate

University: University of Al Mosul - College Of Engineering - Department Of Electrical Engineering

Language: English

University location: Mosul

First pages:

امكانيـة الهوائيات التشـعبية على التركـيز == Feasibility Of Focused Fractal Antennas

Author name: ايناس اسامة طه الشبخون

Supervisor name: خليل سيد مرعي

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Doctorate

University: University of Al Mosul - College Of Engineering - Department Of Electrical Engineering

Language: English

University location: Mosul

First pages:

تصميم ومحاكاة مصفوفة كانتور للهوائيات الخطية == Design And Simulation Of Cantor Linear Antenna Array

Author name: فواز جنان جبرائيل

Supervisor name: رفعت طالب حسين

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: University of Technology - Electrical Engineering Department - Electronic Engineering Branch

Language: English

University location: Baghdad

First pages:

التحقق من تقنيات المعادل التكيفي لمنظومة مزج تقسيم التردد المتعامد == Investigation Of Adaptive Equalizer Techniques For OFDM System

Author name: علي نجدي عبد الله

Supervisor name: ثامر محمد جميل

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: University of Technology - Electrical Engineering Department - Electronic Engineering Branch

Language: English

University location: Baghdad

First pages:

Analysis, Design And Simulation Of Combined Fractal Dipole Antennas

Author name: مصطفى خالد طاهر

Supervisor name: Rifaat Talib Hussein

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: University of Technology - Electrical Engineering Department - Electronic Engineering Branch

Language: English

University location: Baghdad

First pages:

تنفيذ المرمز وفاتح الترميز لنظام الترميز المرن الهجين المتراص الملتف باستخدام مصفوفة البوابات المنطقية المبرمجة == FPGA Implementation Of Flexible Hybrid Concatenated Convolutional Codec

Author name: رغد زهير يوسف المقدسي

Supervisor name: وليد امين الجوهر | معتز شناسي عبد الوهاب

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Doctorate

University: University of Technology - Electrical Engineering Department - Electronic Engineering Branch

Language: English

University location: Baghdad

First pages:

المستلم النفاث التكراري في الاتصالات المتنقلة == Iterative Turbo Receiver For Mobile Radio Communication

Author name: مهند اسماعيل الفراس

Supervisor name: صديق يوسف امين

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Doctorate

University: University of Technology - Electrical Engineering Department - Electronic Engineering Branch

Language: English

University location: Baghdad

First pages:

اعادة تركيب المقاطع المفقودة في حيز المويجة في صورة == Wavelet - Domain Reconstruction Of Lost Blocks In Image

Author name: احمد حسن هادي

Supervisor name: وليد امين محمود | معتز شناسي عبد الوهاب

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: University of Technology - Electrical Engineering Department - Electronic Engineering Branch

Language: English

University location: Baghdad

First pages:

Author name: مينا محسن وائل

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: Al-Nahrain University - College of Information Engineering

Language: English

University location: Baghdad

First pages:

نظام التصويت الموحد باستخدام المعرفة الصفرية والتشفير المتماثل == Combined Zero Knowledge Proof And Homomorphic Encryption Voting

Author name: ندى مهدي كيطان

Supervisor name: Mahmood Khalil Ibraham

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: Al-Nahrain University - College of Information Engineering

Language: English

University location: Baghdad

First pages:

نظام معلومات طبي مقدم للاطباء الاخصائيين والمقيمين الاقدميين == Medical Information System For Seniors And Residents Physicians

Author name: رباب عبد الرسول كاظم

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: Al-Nahrain University - College of Information Engineering

Language: English

University location: Baghdad

First pages:

اكتساب الشفرة في انظمة الطيف المنتشر بالسلسلة المباشرة == Code Acquisition Of Direct Sequence Spread Spectroum System

Author name: توفيق زهير توفيق

Supervisor name: حسين كامل جايل

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: University of Technology - Electrical Engineering Department - Electronic Engineering Branch

Language: English

University location: Baghdad

First pages:

دراسة اداء ومحاكاة للتضمين الترميزي التشعيري وانتشار الترميز الزمني الازاحي == Performance Study And Simulation Of TCM And Distributed Space Time Coding

Author name: وفاء محمد رضا شاكر

Supervisor name: وليد امين محمود

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: University of Technology - Electrical Engineering Department - Electronic Engineering Branch

Language: English

University location: Baghdad

First pages: