One of the pioneer bands identified in Europe for the early deployment of 5G systems is the 3400-3800 MHz (C-band). This band is already used throughout Europe (and elsewhere) for both Fixed Service (i.e. radio relays) and Fixed Satellite Service (FSS), mainly Earth stations. Coexistence with broadband mobile services should be investigated to properly identify operational conditions in real environments. Measurements in literature are lacking for 'Very Small Aperture Terminal' (VSAT), whose location may not be known and that represents an important class of FSS terminals worldwide. This contribution gives an account of an experimental campaign aimed at determining the conditions of co-channel and adjacent-channel coexistence between LTE transmission and satellite reception by means of a consumer-grade VSAT receiver. The experimental campaign comprised on-air measurements implemented at the Ministry of Economic Development (MISE) premises of the National Radio-electrical Emissions Centre (CNCER) in Rome, complemented by tests performed with Plum Consulting and Huawei in their laboratory near Milan. Results show that coexistence is possible provided that proper separation distances for co-frequency coexistence are determined while adjacent channel coexistence is less critical. The characteristics of VSAT equipment studied by lab tests show a relatively small variation in selectivity between different receivers.
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