@InProceedings{LimaDuaNasSouXav:2021:PaSoUl,
               author = "Lima, Raffael S. C. G. de and Duarte, Jos{\'e} Marcelo de Lima 
                         and Nascimento, Diego V. Cirilo do and Souza Filho, Reinaldo A. de 
                         and Xavier de Souza, Samuel",
          affiliation = "{Universidade Federal do Rio Grande do Norte (UFRN)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Federal do Rio Grande do Norte (UFRN)} and 
                         {Universidade Federal do Rio Grande do Norte (UFRN)} and 
                         {Universidade Federal do Rio Grande do Norte (UFRN)}",
                title = "A parallel software-defined ultra-low-power receiver for a 
                         satellite message forwarding system",
            booktitle = "Proceedings...",
                 year = "2021",
         organization = "Brazilian Symposium on Computing Systems Engineering (SBESC), 
                         11.",
            publisher = "IEEE",
             keywords = "multi-user receiver, message storage and forwarding system, 
                         ultra-low power, multi-core architecture, parallel processing.",
             abstract = "Nanosatellites have become the standard solution for most space 
                         systems operating in Low Earth Orbit (LEO). However, this category 
                         of satellite imposes strong restrictions on the energy consumption 
                         of its subsystems due to the small size of its solar panels. This 
                         work presents a parallel software-defined multi-user Phase Shift 
                         Keying (PSK) receiver for a nanosatellite payload that will serve 
                         the Global Open collecting Data System (GOLDS), a message storage 
                         and forwarding system. For this, we chose the GAP8, an embedded 
                         multi-core RISC-V microprocessor. We use a parallel approach and 
                         dynamic voltage and frequency scaling (DVFS) to implement complex 
                         signal processing ensuring low power consumption and meeting the 
                         real-time operating condition. The receiver's input signals are 
                         400 bps Machested encoded +/-pi/3-PSK burst signals from 
                         terrestrial platforms, and the communication channel was modeled 
                         as AWGN with an independent flat fading per PSK signal. A MATLAR 
                         reference model was used for functional validation of the proposed 
                         implementation. Up to 12 signals can be decoded simultaneously 
                         requiring a maximum power consumption of 41 mW. The use of DVFS 
                         provided a maximum savings of 43% in dissipated power and 12% in 
                         energy consumption.",
      conference-year = "22-25 nov. 2021",
                  doi = "10.1109/SBESC53686.2021.9628300",
                  url = "http://dx.doi.org/10.1109/SBESC53686.2021.9628300",
             language = "en",
           targetfile = "
                         
                         A_parallel_software-defined_ultra-low-power_receiver_for_a_satellite_message_forwarding_system.pdf",
        urlaccessdate = "03 jun. 2024"
}