Pany, ThomasAkos, DennisArribas, JavierBhuiyan, M. Zahidul H.Closas, PauDovis, FabioFernandez-Hernandez, IgnacioFernandez-Prades, CarlesGunawardena, SanjeevHumphreys, ToddKassas, Zaher M.Salcedo, Jose A. LopezNicola, MarioPsiaki, Mark L.Ruegamer, AlexanderSong, Young-JinWon, Jong-Hoon2025-02-272025-02-272024-01-240028-1522https://hdl.handle.net/10919/124735Taking the work conducted by the global navigation satellite system (GNSS) software-defined radio (SDR) working group during the last decade as a seed, this contribution summarizes, for the first time, the history of GNSS SDR devel-opment. This report highlights selected SDR implementations and achievements that are available to the public or that influenced the general development of SDR. Aspects related to the standardization process of intermediate-frequency sample data and metadata are discussed, and an update of the Institute of Navigation SDR Standard is proposed. This work focuses on GNSS SDR implementations in general-purpose processors and leaves aside developments conducted on field programmable gate array and application-specific integrated circuit platforms. Data collection systems (i.e., front-ends) have always been of paramount importance for GNSS SDRs and are thus partly covered in this work. This report represents the knowledge of the authors but is not meant as a complete description of SDR history.45 page(s)application/pdfenCreative Commons Attribution 4.0 InternationalGNSSsoftware-defined radioArticle - Refereedhttps://doi.org/10.33012/navi.628711Psiaki, Mark [0000-0002-3070-1217]2161-4296