Mobile-satellite communication services are now being offered all over the world. In order to share the limited frequency bandwidth among many MSS systems, a perpetual requirement is to improve the spectrum utilization efficiency. For this purpose, it is important to consider how to not only share the same frequency bandwidth between different systems but also improve spectrum utilization efficiency within an MSS system.
ITU-R REPORT M.2175-2010 history
2010ITU-R REPORT M.2175-2010 Simultaneous dual linear polarization transmission technique using digital cross-polarization cancellation for MSS systems