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Narrowband satellite communications (SATCOM) in the ultra high frequency (UHF) band is an attractive option within the military SATCOM (MILSATCOM) community. The UHF user terminals (UTs) are typically low cost, easily deployable and have broad beamwidths so that precise pointing to the satellite is not a requirement for mobile users. At the same time, some inherent disadvantages of UHF SATCOM are...
In this paper we present a MIMO model for a line-of-sight (LOS) satellite communication (SATCOM) channel, utilising orthogonal circular polarizations and spatial diversity from multiple satellites in geostationary orbit. To achieve spatial orthogonality in a LOS SATCOM channel, antenna separation of the order of hundreds of kilometres is required, either on the ground or in space. In this paper we...
Utilizing orthogonal polarizations is a well-known frequency reuse technique in satellite communications (SATCOM) to provide additional spectrum in a given geographical region. However, in practice there will be a link degradation due to cross talk between the two polarization channels. The cross talk results from the combined effects of the antenna's imperfect ability to distinguish between the two...
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