%0 Conference Paper %B IEEE 91st Vehicular Technology Conference (VTC2020-Spring), 25-28 May 2020, virtual event. %D 2020 %T Non-coherent rate-splitting for multibeam satellite forward link: practical coding and decoding algorithms %A Nele Noels %A Marc Moeneclaey %A Tomás Ramírez %A Carlos Mosquera %A Màrius Caus %A Adriano Pastore %B IEEE 91st Vehicular Technology Conference (VTC2020-Spring), 25-28 May 2020, virtual event. %G eng %0 Conference Paper %B 6th IEEE Global Conference on Signal and Information Processing %D 2018 %T Symbol-Asynchronous Transmission In Multibeam Satellite User Down-Link: Rate Regions For Novel Superposition Coding Schemes %A Nele Noels %A Marc Moeneclaey %A Tomás Ramírez %A Carlos Mosquera %A Màrius Caus %A Adriano Pastore %X

We consider the forward link of a multibeam satellite system with high spectral reuse and the novel low-complexity transmission and detection strategies from ["“Exploratory analysis of superposition coding and rate splitting for multibeam satellite systems", ISWCS 2018]. More specifically, we study the impact of a time offset between the antenna beams that cooperate to simultaneously serve a given user. Assuming Gaussian signaling, we provide closed-form expressions for the achievable rate region. It is demonstrated that, in the absence of timing information at the gateway, this region is not affected by a time offset. Our numerical results further show that, in case timing is known at the gateway, an offset of half a symbol period at both user terminals is optimal in terms of spectral efficiency.

%B 6th IEEE Global Conference on Signal and Information Processing %G eng