Performance analysis of direct sequence code division multiple access in mobile nonlinear satellite channel
مقدم أطروحة جامعية
مشرف أطروحة جامعية
الجامعة
جامعة أم درمان الإسلامية
الكلية
كلية العلوم الهندسية
القسم الأكاديمي
قسم الهندسة الكهربائية و الإلكترونية
دولة الجامعة
السودان
الدرجة العلمية
دكتوراه
تاريخ الدرجة العلمية
2007
الملخص الإنجليزي
The objective of this thesis is to study, analysis, plan and design software program to calculate and simulate the performance of the code division multiple access signal transmission through mobile satellite channel using Quadrature Amplitude Modulation and Walsh Hadmard code. The performance of CDMA system is performed using an analytical model with both Gaussian process (GA) and improved Guassian approximation (IGA).
The performance of the system consider the effect of traveling wave tube(TWTA) on board satellite, uplink and down link additive white Guassian noise (AWGN), multiple access interference, and mobile fading channels in suburban, open and urban areas.
System performance in terms of the error probability was calculated and simulated using Borland Delphi and WINIQSIM software program. From the obtained results, a comparison between analytical method using improved Gaussian approximated (IGA) and Gaussian process models is done under different mobile propagation channels.
This is done at different parameters of input back-off, A WGN, code length (N), and number of users (M). The results obtained from analytical model show that increasing the input back-off reduces the value of bit error rate up to a certain limit.
Any further increase in back -off results in a fixed value of bit error rate if the linear region of the characteristic of TWT A is reached As a result, measuring the code length reduces the value of bit error up to a certain limit.
Also, increasing the number of users increases the value of bit error to a certain limit depending on the SNR. The results of both analytical and simulation methods, in terms of the error probability are in a good agreement.
التخصصات الرئيسية
الموضوعات
عدد الصفحات
155
قائمة المحتويات
Table of contents.
Abstract.
Chapter One : Introduction.
Chapter Two : Mobile satellite communication.
Chapter Three : Code division multiple access.
Chapter Four : Ds-CDMA performance using gaussian approximation in mobile satellite channel.
Chapter Five : Ds-CDMA performance using improve gaussian approximation in mobile satellite channel.
Chapter Six : Simulation of CDMA / QAM signal transmission in mobile satellite channel.
Chapter Seven : Conclusions and recommendations.
References.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Abd Allah, Khalid Hamid Bilal. (2007). Performance analysis of direct sequence code division multiple access in mobile nonlinear satellite channel. (Doctoral dissertations Theses and Dissertations Master). Omdurman Islamic University, Sudan
https://search.emarefa.net/detail/BIM-366392
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Abd Allah, Khalid Hamid Bilal. Performance analysis of direct sequence code division multiple access in mobile nonlinear satellite channel. (Doctoral dissertations Theses and Dissertations Master). Omdurman Islamic University. (2007).
https://search.emarefa.net/detail/BIM-366392
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Abd Allah, Khalid Hamid Bilal. (2007). Performance analysis of direct sequence code division multiple access in mobile nonlinear satellite channel. (Doctoral dissertations Theses and Dissertations Master). Omdurman Islamic University, Sudan
https://search.emarefa.net/detail/BIM-366392
لغة النص
الإنجليزية
نوع البيانات
رسائل جامعية
رقم السجل
BIM-366392
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر
