Enhancement of mobile radio channel using diversity techniques

مقدم أطروحة جامعية

Abd al-Husayn, Muhannad Muhammad

مشرف أطروحة جامعية

Hadi, Wail A. H.

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم الهندسة الكهربائية

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2010

الملخص الإنجليزي

Diversity is considered one of most effective ways to improve the performance of transmission in the fading and interference channels.

It can be exploited under, time, frequency or space (spatial) domain.

Due to its efficiency in terms of system resource usage, the diversity type, utilized in the whole of this thesis is spatial diversity which is applied to a multiple spatially separated antennas at the transmitter and / or the receiver known as multiple antennas systems such as Single-Input Multiple-Output (SIMO) system, Multiple-Input Single-Output (MISO) system, and Multiple-Input Multiple-Output (MIMO) system.

The use of multiple transmit and receive antennas (MIMO system) is widely accepted in recent years, as a promising technology for future wireless communication, due to its ability to achieve higher data rates without increasing the transmission power and bandwidth, in addition to its ability to improve system reliability through increasing diversity.

This work introduces comparative studies that determine the diversity and channel capacity enhancements, resulting from using multiple antennas systems over single antenna system, which is known as Single-Input Single-Output (SISO) system.

These enhancements were done in term of Bit Error Rate (BER) and bit rate of data transmission for the diversity and capacity enhancements, respectively.

In this work, a developed mobile channel model has been designed, which can be used to generate SISO, SIMO, MISO, and MIMO Rayleigh fading channels.

Then, Selection Combining (SC), Equal Gain Combining (EGC), and Maximal Ratio Combining (MRC) techniques have been studied and analyzed for receiving diversity (SIMO system).

Furthermore, maximal ratio has been studied for transmitting diversity (MISO system), which is known as Maximal Ratio Transmission (MRT).

On the other hand, the performance of diversity based on MIMO system.

التخصصات الرئيسية

هندسة الاتصالات

الموضوعات

• الإذاعة

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-304938