This thesis is a part of the Wireless-IP project and concerns the
modeling and simulation of a wideband radio channel. The simulator
is to be an evaluating tool for new methods, which are to improve
the capacity and speed of wireless Internet connections, as well as
a tutorial in radio channel features. Since measured radio channels
are a scarce resource there is a need for a channel simulator, which
can create channels with features similar to measured channels.
The simulator has to be able to create simulations from a couple
of samples up to several minutes taking both short and long term effects
into account. The model has one, single antenna, base station which
handles several mobiles moving in a “cell” and the surrounding environment
is made of two different types of clusters of scatterers. A simplified
type of ray-tracing is used to generate small scale fading and path-loss.
Shadow fading is considered to be a stochastic process and added to
the model separately.
Simulations were made and compared with measured channels from Kista
giving satisfying results of the small scale fading features. A single
long measured channel was also used to verify that shadow fading can
be seen as an AR(1)-process.