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محاكاة تضمين تقسيم التردد المتعامد المتعدد المستخدمين المشفر في الخط النازل == Simulation of Coded Multiuser Ofdm Downlink

Author name: دﻧﻴﺎ ﻓﺆاد فاروق النعيمي
Supervisor name: رعد سامي فياض
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Communications Engineering
Degree: Master
University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering
Language: English
University location: Baghdad
First pages:
Abstract: The orthogonal frequency division multiple access (OFDMA) scheme adopts orthogonal frequency division multiplexing (OFDM) subcarriers, which are particularly suited for transmition over broadband frequency selection channels, to support multiusers. The scheme considered usually assigns a subset of subcarriers to each user and adopted adaptive techniques for the allocation of available resources/subcarriers according to the channel state information (CSI) estimated at the transmitter using a reverse link. This thesis proposed three coded multiuser OFDM schemes based on spreading the data of each user over all subcarriers without CSI at the transmitter. The idea behind these schemes is to split the OFDM transceiver into two stages : one common to all users while the other consists of identical parallel units with each unit is used to process the data related to an individual user. The two stages are separated by a multiplexer/demultiplexer unit whose position can be chosen to yield different schemes. The three schemes considered here are : user multiplexed scheme, inner coded multiplexing scheme, and mapper multiplexing scheme. The proposed schemes implemented are using MATLAB simulink (version 7) to investigate their performance under different operating conditions related to number of users, Rayleigh fading channel, and serial concatenated codes. The results are compared with those related to two conventional schemes, subcarrier mapping scheme and outer coded multiplexing scheme. The simulation results indicate that the proposed user multiplexing scheme may offer performance as high as that offered by the conventional outer coded multiplexing scheme but with reduced number of equipments.

تهيئة حاسوبية لموجه سيسكو == Computer Based Configuration For Cisco Routers

Author name: فارتان رافي كريكوريان
Supervisor name: غسان حميد عبد المجيد
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Communications Engineering
Degree: Master
University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering
Language: English
University location: Baghdad
First pages:
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. As a result of this analysis, a new approach is proposed in this thesis which eliminates the limitations. The work proposes a graphical interface which is executed on a desktop (or laptop) PC. The user defines the configuration parameters through a program which transfers these parameters to the router by console port instead of Ethernet port. These parameters are then saved on Non Volatile Random Access Memory. The proposed graphical interface is implemented by standard lab consisted of two routers. The implementation shows that the time of configuration can be reduced to 70% of the text mode approach, and overcome the trouble of the old graphical interface.

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
Key words:
  • Radio - over - Fiber (RoF)
  • Quadrature Phase Shift Keying (QPSK)
  • Quadrature Amplitude Modulation (QAM)
  • Orthogonal Frequency Division Multiplexing (OFDM)
  • Digital Signal Processing (DSP) Unit
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.

تخطيط الشبكة الراديوية لنظام LTE == Radio Network Planning For LTE

Author name: عبيدة عبد الوهاب جاسم
Supervisor name: سامي محمد طاهر عبد الموجود
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Communications Engineering
Degree: Master
University: University of Al Mosul - College Of Engineering
Language: Arabic
University location: Mosul
First pages:

تحليل وتصميم ثم محاكاة وتحقيق خوارزميات التوجيه في شبكات المتحسسات اعتمادا على النظرية الالكتروستاتيكية == Analysis, Design, Simulation and Validation of WSN Routing Algorithms Based on Electrostatic Theory

Author name: محمد مناف حميد القزاز
Supervisor name: عبد الاله عبد الجبار عبد الله
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Communications Engineering
Degree: Master
University: University of Al Mosul - College Of Engineering
Language: Arabic
University location: Mosul
First pages:

تحليل وتصميم شبكات المركبات المتنقلة == Analysis And Design Of Vehicular Ad hoc Networks (VANets)

Author name: احمد فوزي صالح بدر الراوي
Supervisor name: قتيبة ابراهيم علي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Communications Engineering
Degree: Master
University: University of Al Mosul - College Of Engineering
Language: Arabic
University location: Mosul
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:

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:

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:

ربط متعدد المدخلات متعدد المخرجات مع ترميز الشبكة في الشبكات اللاسلكية == Combined Multi - Input Multi - Output And Network Coding For Wireless Networks

Author name: الزا عبد الجبار محمود
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:

تصميم ومحاكاة نظام تتبع الترداد باستخدام تقنية معالج الاشارة الرقمية == Design And Simulation Of A Frequency Tracking System Using DSP Techniques

Author name: بشار جبار حمزة
Supervisor name: علي عباس علي
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:

تحليل وتنفيذ بث الفيديو المباشر متعدد الارسال IEEE 802.11n باستخدام الشبكة اللاسلكية لنظام == Analysis And Implementation Of Multicast Video Streaming Over IEEE802.11n WLAN

Author name: استبرق حازم عبد الواحد مكية
Supervisor name: عماد الحميري
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:

تحسين جودة الفديو عبر الشبكات المتنقلة المخصصة == Improving Video Quality Over Ad - Hoc Networks

Author name: غيداء مطشر عبد الصاحب
Supervisor name: Abdulkareem Abdulrahman Kadhim | Anas Ali Hussien
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:

ضغط الصورة باستعمال الدمج بين تحويل المويجة والتشكيل النبضي التفاضلي المرمز == Hybird DPCM / WT For Image Compression

Author name: وسن كاظم سعد
Supervisor name: سعيد عبيد عبد الامير
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 وتحليل الخصائص الفيزيائية وتقنيات الوصول في المنظومات اللاسلكية متعددة المستخدمين == Analysis Of Physical Layer Characteristics And Multiple Access Techniques In Multiuser Wireless Networks

Author name: منصور عابد
Supervisor name: وليد امين الجوهر
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:

مسيطر على سرعة محرك تيار مستمر باستخدام مصفوفة البوابة للمجال المبرمج (FPGA) == DC Motor Speed Controller Employing FPGA

Author name: قاسم كرم عبد الله الربيعي
Supervisor name: زياد محمد احمد
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:

مراقب لمعالجة معاملات لنظام التجارة الالكترونية == Transaction Processing Monitor For A E - Commerce System

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:

تطوير ارسال فديو متعدد الطبقات باستخدام OFDM == Development Of Scalable Video Transmission Using Orthogonal Frequency Division Multiplexing

Author name: وليد خالد عبد الوهاب
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:

تخميـن الحركـة لضغط الصـورة التلفـزيـونيـة مع تقـنيـة الاقتران == Motion Estimation For TV Picture Compression With Mapping Technique

Author name: فائز فواز شريف
Supervisor name: سعيد عبيد
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:
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