Tutorial Session – proposed outline

Tutorial B2: Propagation characteristics of satellite-to-mobile and satellite-to-indoor links Prof. Istvan Frigyes Siena, Sept. 8, 2005 Two main physical phenomena determine propagation characteristics of any mobile wireless link – terrestrial or satellite – i.e. multipath propagation and shadowing. Indoor or indoor-to-outdoor links, different in some aspects from their land mobile counterparts are essentially also driven by these phenomena. Main consequences of these are investigated since the advent of mobile communications. Properties are well known – at least in the case of terrestrial links. Satellite links, on the other hand, are influenced by these physical processes in many aspects in a different way. This is mainly due to the significantly different environment. The purpose of this tutorial is to show and discuss some of these different effects. After a brief survey of the main propagation characteristics three phenomena are dealt with in some detail. Differences between satellite and terrestrial links and also between satellite to mobile and satellite to indoor links are pointed out. Subjects to be covered: 1. Main propagation effects in mobile satellite links: multipath and shadowing. Modeling of the shadowed and multipath satellite -to-mobile link. 2. Doppler effect in LEO satellite links. Doppler effect: generalities. Recall of Doppler characteristics of terrestrial links. General modeling of Doppler effect in satellite links. ...