Design and implementation of direct sequence spread spectrum system using field programmable gate array

مقدم أطروحة جامعية

al-Shammari, Hikmat Najm

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم الهندسة الكهربائية

دولة الجامعة

العراق

الدرجة العلمية

دكتوراه

تاريخ الدرجة العلمية

2004

الملخص الإنجليزي

Direct sequence spread spectrum communication systems have played an outgrowing role in modern communication systems for both military and civil applications due to their unique features.

In this thesis, a direct sequence spread spectrum communication system (DS / SS) is designed and implemented using MATLAB-Simulink and then using Xilinx FPGA devices.

First, a MATLAB-Simulink tool is used for designing and implementing DS / SS system to obtain system parameters and to test the influence of signals on the system.

For this purpose, a search / lock control unit (SLCU) is proposed to control the synchronization process.

Second, the logic .description of each component in the DS / SS system is derived for the purpose of FPGA implementation.

The direct implementation of these logic descriptions requires high, cost of FPGA gate resources and hence the implemented" system would operate at low speed.

A set of proposals is suggested to reduce the required FPGA implementation cost at the same speed or less.

Using these proposals, a DS / SS system in the presence of data modulation (well-known problem in DS / SS system) is implemented over Xilinx-virtcx FPGA platform.

The proposals related to transmitter implementation include : L 1- The use of SRL16E Marco to implement spreading code.

2- The use of quadrature symmetry of cosine lookup table of binary phase shift keying modulator.

التخصصات الرئيسية

هندسة الاتصالات

الموضوعات

• الاتصالات السلكية و اللاسلكية

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-305492