Low-cost SDR platforms for multi-frequency GNSS synchronous acquisition

The use of multiple frequencies in GNSS allows for greater accuracy of the navigation receiver. This not only reduces the impact of the ionosphere, but also provides additional signals to enhance robustness. In various applications, receivers require synchronous access to samples from different frequency bands. In this paper, we provide an overview of several low-cost SDR platforms that enable synchronized sample capture and describe how to configure them for this purpose. Finally, we discuss GNSS applications, such as Galileo SAS, that can take advantage of these platforms for testing and evaluation.