A New Doppler model for LMS Channel

The ITU-R Rec. P.681, which tackle Land Mobile Satellite (LMS) channel model between 1 to 20 GHz, provides reliable results from the statistical distribution point of view [1]. However, the spectrum part of the model (i.e. Doppler model) is not completely relevant in the case of LMS links. For instance, a terrestrial model is assumed (Jakes model, [2]) and thus, second order statistics are not well reproduced by the ITU-R P681. In recent experimentations, we investigated the Doppler spectrum shape, [3]. Based on these results, we propose in this paper a new Doppler spectrum model reliable for LMS application.