Pany, ThomasThomasPanyAkos, DennisDennisAkosArribas, JavierJavierArribasBhuiyan, M. Zahidul H.M. Zahidul H.BhuiyanClosas, PauPauClosasDovis, FabioFabioDovisFernandez-Hernandez, IgnacioIgnacioFernandez-HernandezFernández-Prades, CarlesCarlesFernández-PradesGunawardena, SanjeevSanjeevGunawardenaHumphreys, ToddToddHumphreysKassas, Zaher M.Zaher M.KassasLópez Salcedo, José A.José A.López SalcedoNicola, MarioMarioNicolaPsiaki, Mark L.Mark L.PsiakiRügamer, AlexanderAlexanderRügamerSong, Young-JinYoung-JinSongWon, Jong-HoonJong-HoonWon2024-05-172024-05-172024https://publica.fraunhofer.de/handle/publica/46846110.33012/navi.6282-s2.0-85184153193Taking 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.enGNSSsoftware-defined radiojournal article