SDR GNSS receivers: A comparative overview of different approaches

Abstract

Co-existence of different constellations for Global Navigation Satellite Systems (GNSS) provides new opportunities to improve the services offered to the users, but also poses new challenges and increased complexity in receiver design. To ensure flexibility and dynamic re-configuration, Software Defined Radio (SDR) receivers seem to be the natural solution, both for the research and industrial communities. This paper wants to provide an overview of the solutions proposed until now, trying to highlight what the trend is in SDR GNSS receiver development, and to what extent currently proposed SDR approaches are able to replace traditional hardware-based design.

Hybridized-GNSS Approaches to Train Positioning: Challenges and Open Issues on Uncertainty

“…So-called Location Determination Systems (LDSs) encompass the necessary technological components to enable location awareness. Among them, the Global Navigation Satellite System (GNSS), a constellation of satellites transmitting positioning and timing data from space to GNSS receivers, that use these data to determine their location [3], still is the only LDS able to provide position, velocity, and time (PVT) necessary for localization purposes, on a global scale and on a continuous time basis. By definition, GNSS provides a global coverage, ensured by the harmonization of the technical specifications (such as frequencies and bandwidth allocation) among the European Galileo, the NAVSTAR Global Positioning System (GPS) from USA, the Russian GLONASS, and the BeiDou requirements, performance standards, and future concepts of maritime GNSS integrity are discussed in [6].…”