الفهرس 
Chapter I : Introduction to wireless communicationOnly 14 pages are availabe for public view
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Abstract
This research addresses the performance of the mobile communication systems
over severe channel conditions, the most common and best understood performance
measure characteristic of a digital communication system is average bit error probability
(BEP), where the word average refers to statistical averaging over the probability
distribution of the fading.
The research addresses the evolution of mobile communication systems to
achieve higher data rates including D-AMPS, GSM, IS-95, HSCSD, GPRS, EDGE,
UMTS, HSDPA , HSUPA , HSPA + , WiMAX and LTE.
The research addresses the mobile communication channel environment, its main
characteristics including path loss, shadowing, fast fading, noise and the different channel
fading models including Rayleigh, Rician, Nakagami and Log-Normal.
The research addresses the performance of different communication systems in
severe channel environment by simulating the following modulation techniques BPSK,
MSK, QPSK and 8PSK using MatLAB for different Fading Models including Rayleigh ,
Rician ,Nakagami and Log-Normal. The simulation shows that different communication
systems most probably will have a bad performance in severe channel environment.
The channel coding as one of the performance enhancement techniques had been
simulated to overcome the bad performance in severe channel environment, the
simulation shows high code gain for Nakagami fading compared to Rayleigh and Rician.
Diversity is another enhancement performance technique for mobile communication
systems, A simulation of Ideal Switching Combining and Equal Gain Combining techniques for
different fading models showed the diversity gain in each case.
The software package generated during this study can be considered as a test bed for
mobile communication systems in different channel environment.