Summary:
In this thesis, for obtaining a Master's degree, a wireless digital
communication channel between a transmitter and a receiver is studied. There is
a description of the phenomena that exist in the environment that affect
communication, such as signal attenuation with the distance, fading caused in
an environment with obstacles or relative motion of objects - transceivers and
thermal noise or the interference of adjacent links. Furthermore, the most
common models that have occasionally been proposed for stochastic approximation
of the conditions in a communication link and that try to mathematically
describe the phenomena mentioned above are described. These stochastic models
are one of the most important objects of research activity, publications of
which were the source of the current bibliographic literature. Then, there is
an effort to develop a simulation tool in the environment of Matlab ® program
in order to verify the performance of the Rayleigh fading model in a link where
a QPSK signal is transmitted and no visual contact between the transmitter and
receiver exists. The aim of this tool is to trigger the simulation of all the
other models that have scientific interest and its parameters can be fully
adjusted, as there has been an attempt not to use ready functions or simulators
that restrict the freedom of the researcher.
Keywords:
Wireless communications, Fading, Stochastic channel modeling, Rayleigh, Simulation Matlab
