Abstract:
A profound knowledge of mobile radio channels is required for the development,
evaluation, and also assessment at practical conditions of present and future mobile
radio communication systems. The modelling, analysis, and simulation of mobile
radio channels are important sub area since the initiation of mobile
communications. In addition to that knowledge of channel behaviour in mobile
radio communication is extensively recommended for the study of
transmitter/receiver performances. Our intention in this research work is to develop
various kinds of mobile fading channel simulators using MATLAB and embed them
into MATLB software as a toolbox.
Implemented channel simulators were combined into a user-friendly Matlab toolbox
from which users can easily select well-known channel models to test and to study
the performance of mobile communication systems. It gives better support for the
new users to work on the developed channel simulators, run the test procedures as
well as parameter computation.
The toolbox contains channel simulators for simulating non-stationary land mobile
satellite channel, spatial shadowing processes, MIMO channels, multiple
uncorrelated Rayleigh fading channels, mobile to mobile channel, frequency
hopping channels etc. We developed set of test procedures, such as the
autocorrelation function ACF, average duration of fades ADF, the probability
density function PDF, and the level-crossing rate LCR [1,2] etc., in order to test
and to confirm the correctness of the implemented channel simulators. Proposed
new algorithms to compute the model parameters of the channel simulators were
also implemented in the toolbox to enable the parameterization of the channel
simulators under specific propagation conditions. Finally, “how can a channel
simulator be tested?” have been address in this work as research question. It was
based on the comparison of simulation results with the measured model or the
reference model under different scenarios. In addition to that selection of the t
simulation time duration, sampling rate and size of the samples were considered.
Some of the simulation models were implemented based on specification of GSM
system by CEPT-COST 207.
