Scheme of a ray tracing program INPUT OUTPUT Geometric input Rx field e.m.input Rx power environment RAY TRACING Fading stat Source/destination FIELD COMPUTATION (Terminal)positions Multidim. parameters antenna parameters (before and/or Radio link After The RX Run parameters antenna) 1313 Scheme of a ray tracing program Geometric input antenna parameters Source/destination (Terminal) positions e.m. input Run parameters environment Radio link INPUT RAY TRACING + FIELD COMPUTATION OUTPUT (before and/or After The RX antenna) Rx field Rx power Fading stat Multidim. parameters