%0 Journal Article %J International Journal of Satellite Communications and Networking %D 2023 %T Contribution of non-orthogonal multiple access signalling to practical multibeam satellite deployments %A Tomás Ramírez %A Carlos Mosquera %B International Journal of Satellite Communications and Networking %G eng %R https://doi.org/10.1002/sat.1492 %0 Conference Paper %B 40th International Communications Satellite Systems Conference (ICSSC) %D 2023 %T Overview of Use Cases in Single Channel Full Duplex Techniques for Satellite Communication %A Víctor Monzón Baeza %A Carlos Mosquera %A Roberto López-Valcarce %A JL González-Ríos %A JA Vasquez-Peralvo %A Tomás Ramírez %A P Losada %A JC Merlano %A S Chatzinotas %A Steven Kisseleff %B 40th International Communications Satellite Systems Conference (ICSSC) %G eng %0 Conference Paper %B 11th Advanced Satellite Multimedia Conference and 17th Signal Processing for Space Communications Workshop %D 2022 %T Contribution of NOMA Signalling to Practical Multibeam Satellite Deployments %A Tomás Ramírez %A Carlos Mosquera %B 11th Advanced Satellite Multimedia Conference and 17th Signal Processing for Space Communications Workshop %G eng %0 Journal Article %J IEEE Transactions on Broadcasting %D 2022 %T Flexible User Mapping for Radio Resource Assignment in Advanced Satellite Payloads %A Tomás Ramírez %A Carlos Mosquera %A Nader Alagha %B IEEE Transactions on Broadcasting %G eng %0 Conference Paper %B 9th European Signal Processing Conference, EUSIPCO 2021 %D 2021 %T Flexible Beam-User Mapping for Multibeam Satellites %A Tomás Ramírez %A Carlos Mosquera %A Nader Alagha %B 9th European Signal Processing Conference, EUSIPCO 2021 %C Dublin, Irlanda %G eng %0 Conference Paper %B 38th International Communications Satellite Systems Conference (ICSSC), %D 2021 %T Non-Orthogonal Transmission Under Flexible Illumination Patterns For Advanced Satellite Payloads %A Tomás Ramírez %A Carlos Mosquera %A Nader Alagha %B 38th International Communications Satellite Systems Conference (ICSSC), %C Washington DC, USA %G eng %0 Journal Article %J IEEE Transactions on Communications %D 2021 %T Space-Time Rate Splitting for the MISO BC with Magnitude CSIT %A Carlos Mosquera %A Nele Noels %A Tomás Ramírez %A Màrius Caus %A Adriano Pastore %B IEEE Transactions on Communications %G eng %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 XXXV Simposio Nacional de la Unión Científica Internacional de Radio, URSI 2020 %D 2020 %T On the Performance of Advanced Reflectarray Configurations for Multibeam Satellite Communications %A Tomás Ramírez %A Daniel Martínez de Rioja %A Eduardo Martínez de Rioja %A Carlos Mosquera %A José A. Encinar %B XXXV Simposio Nacional de la Unión Científica Internacional de Radio, URSI 2020 %G eng %0 Conference Paper %B 45th International Conference on Acoustics, Speech, and Signal Processing (ICASSP) %D 2020 %T Resource Management in the multibeam NOMA-based satellite downlink %A Tomás Ramírez %A Carlos Mosquera %B 45th International Conference on Acoustics, Speech, and Signal Processing (ICASSP) %G eng %0 Conference Paper %B 10th Advanced Satellite Multimedia Systems Conference (ASMS) and 16th Signal Processing for Space Communications Workshop (SPSC) %D 2020 %T Study on the Application of NOMA Techniques for Heterogeneous Satellite Terminals %A Tomás Ramírez %A Carlos Mosquera %A Nele Noels %A Màrius Caus %A Joan Bas %A Luis Blanco %A Nader Alagha %B 10th Advanced Satellite Multimedia Systems Conference (ASMS) and 16th Signal Processing for Space Communications Workshop (SPSC) %G eng %0 Journal Article %J EURASIP Journal on Wireless Communications and Networking %D 2020 %T Two-Level Frame Precoding with non-Cooperative Gateways %A Tomás Ramírez %A Carlos Mosquera %A R. López-Valcarce %K myrada %K satcom %K winter %B EURASIP Journal on Wireless Communications and Networking %G eng %U https://rdcu.be/b5KB3 %R https://doi.org/10.1186/s13638-020-01757-7 %0 Conference Paper %B 36th International Communications Satellite Systems Conference (ICSSC) %D 2018 %T Adjacent Beams Resource Sharing to Serve Hot Spots : A Rate Splitting Approach %A Tomás Ramírez %A Carlos Mosquera %A Màrius Caus %A Adriano Pastore %A Nader Alagha %A Nele Noels %X
This work addresses the uneven traffic demand scenario in multi-beam satellite systems, in which a hot-spot beam
is surrounded by cold beams. After partitioning the hotspot beam in different sectors, resource pulling from cold
neighbouring beams is allowed following an aggressive frequency-reuse scheme. As a consequence, the level of
the co-channel interference within the hot-spot beam increases. A scheme known as Non-Coherent Rate-Splitting (NCRS)
is employed to cope with this interference, based on the exclusive use of magnitude channel state information at the transmitter (CSIT).
The receiver complexity is increased with respect to full CSIT precoding schemes, which are considered for benchmarking purposes. Different NCRS strategies are analyzed and compared with several partial and full CSIT schemes. The proposed solution not only shows an improvement with respect to partial CSIT benchmarks, but also displays a competitive performance against full CSIT precoders.
%B 36th International Communications Satellite Systems Conference (ICSSC) %C Niagara Falls, Canada %8 10/2018 %G eng %0 Journal Article %J IEEE Transactions on Wireless Communication %D 2018 %T Distributed Precoding Systems in Multi-Gateway Multibeam Satellites: Regularization and Coarse Beamforming %A Carlos Mosquera %A R. López-Valcarce %A Tomás Ramírez %A Vahid Joroughi %B IEEE Transactions on Wireless Communication %G eng %0 Conference Paper %B 15th International Symposium on Wireless Communication Systems (ISWCS) %D 2018 %T Exploratory Analysis of Superposition Coding and Rate Splitting for Multibeam Satellite Systems %A Màrius Caus %A Adriano Pastore %A Mònica Navarro %A Tomás Ramírez %A Carlos Mosquera %A Nele Noels %A Nader Alagha %A Ana I. Perez-Neira %B 15th International Symposium on Wireless Communication Systems (ISWCS) %C Lisbon, Portugal %G eng %0 Conference Paper %B 9th Advanced Satellite Multimedia Systems Conference (ASMS) and 15th Signal Processing for Space Communications Workshop (SPSC) %D 2018 %T Message-Splitting for Interference Cancellation in Multibeam Satellite Systems %A Tomás Ramírez %A Carlos Mosquera %A Màrius Caus %A Adriano Pastore %A Mònica Navarro %A Nele Noels %B 9th Advanced Satellite Multimedia Systems Conference (ASMS) and 15th Signal Processing for Space Communications Workshop (SPSC) %C Berlin, Germany %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 %0 Conference Paper %B 22nd International Workshop on Smart Antennas (WSA) %D 2018 %T Two-Level Precoding for High Throughput Satellites with non-Cooperative Gateways %A Tomás Ramírez %A Carlos Mosquera %A Roberto López-Valcarce %B 22nd International Workshop on Smart Antennas (WSA) %G eng %0 Conference Paper %B 35th AIAA International Communications Satellite Systems Conference %D 2017 %T Distributed Precoding Systems in Multi-Gateway Multibeam Satellites %A Carlos Mosquera %A R. López-Valcarce %A Tomás Ramírez %K precoding %K satcom %B 35th AIAA International Communications Satellite Systems Conference %C Trieste,Italy %8 10/2017 %G eng %0 Conference Paper %B 8th Advanced Satellite Multimedia Systems Conference and 14th Signal Processing for Space Communications Workshop %D 2016 %T Full-duplex operation in two-way broadcast service for maritime applications %A Tomás Ramírez %A Carlos Mosquera %K compass %K full duplex %K satcom %B 8th Advanced Satellite Multimedia Systems Conference and 14th Signal Processing for Space Communications Workshop %8 09/2016 %G eng