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A GNSS receiver, in general, is an electronic device that receives and digitally processes the signals from a navigation satellite constellation in order to provide position, velocity and time (of the receiver).
GNSS receivers have been traditionally implemented in hardware: a ''hardware GNSS receiver'' is conceived as a dedicated chip that
In a software GNSS receiver, all digital processing is performed by a general purpose [[microprocessor]]. In this approach, a small amount of inexpensive hardware is still needed, known as the ''[[RF front end|frontend]]'', that digitizes the signal from the satellites. The microprocessor can then work on this ''raw'' digital stream to implement the GNSS functionality.
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== Comparison of GNSS SDR implementations ==
{{Needs table|section=y|date=August 2015}}
*'''Galileo Satellite Navigation LTD.- GSN''':
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