Lóránt Farkas, Lajos Nagy, Andrea Farkasvölgyi
Wave propagation channel simulation by satellite-to-indoor radio link
In our paper we present the simulation of the propagation characteristics of the satellite-to-indoor propagation channel. Our first aim has been to find a correct description of the polarization state of the received inside wave. The result of our first investigations is that the polarization state of the indoor wave signigicantly changes as we move further away from the windows that are the secondary source of radiation. First we examine how the polarization state of a complex harmonic field can be described, and then the results of our first simulations of the polarization state will be presented. A modified 3D raylaunching tool has been utilized for the coverage prediction. A detailed analysis of the dependence of the indoor wave on the elevation angle of the satellite is given, and the wideband characteristics of the channel: delay spread characteristics and Doppler spread, caused by satellite movement are dealt with. The applicability of MIMO systems in satellite communication is also investigated.