On the frequency dependence of UWB indoor channel parameters: 3D ray tracing and measurement

In this paper, measurements and 3D ray tracing predictions of multiple input multiple output (MIMO) ultra wideband (UWB) channel parameters in a residential area are presented. The studied UWB channel parameters, i.e. the delay spread and the azimuth and elevation angular spreads, are absolutely required in propagation modeling during the specification phase of future mobile MIMO communications systems. The evolution of the predicted parameters with the number and type of interactions of the simulated channel is also presented. Then, we focus on the frequency dependence of the predicted parameters and compare it with the measurement. Results show limited variations with increasing frequency. This implies that most of indoor normalized channel models can be extended and used for other frequencies.