Simplifying the Propagation Environment Representation for LMS Channel Modelling

A deep knowledge of all propagation effects has become an essential issue to design future communication and navigation systems and optimise their performances. Here, the authors will target Land Mobile Satellite (LMS) systems, with focus on Global Navigation Satellite Systems (GNSS). The urban environment is one of the most critical for LMS systems, since shadowing, multipath fading and time spreading are often present. This paper aims at developing more efficient propagation channel models using physical-statistical approaches. In order to build these models, numerical asymptotic tools are to be used to avoid costly extensive measurements.