Robust multibeam satellite systems for underlay licensed shared access

Abstract

This paper deals with the problem of multibeam satellite precoding design under spectrum sharing constraints. These regulation restrictions allow the coexistence with other wireless services such as terrestrial mm-wave wireless local loop systems. This work focuses on the case where the satellite operator can use a certain frequency band whenever the signal power strength is limited in the coverage area. The precoding design is optimized considering this restriction by means of formulating a robust optimization. Numerical results sh ow the trade-off between the achievable rates of the satellite segment and the regulation violation outage