Gnss receiver with carrier phase tracking, method for performing a carrier phase tracking therein and computer program product

A method for performing a carrier phase tracking in a GNSS receiver, the method comprising:

• receiving at least a satellite signal transmitted from a satellite;
• computing a carrier phase value calculation on a basis of accumulated coherent GNSS signal components derived from the satellite signal by performing a phase computation;
• obtaining a synthetic pilot signal at a first frequency from the accumulated coherent GNSS signal components;
• obtaining a bit estimate of the accumulated coherent GNSS signal components at a second frequency higher than the first frequency and corresponding to the frequency of the accumulated coherent GNSS signal components;
• resolving a Carrier Phase observable Half Cycle Ambiguity resolution on the synthetic pilot signal by:
• estimating a pilot polarity;
• estimating a data polarity from the bit estimate;
• checking if the pilot polarity and data polarity are equal or different and outputting a corresponding check result as polarity information;
• and
• performing an adjustment of a computed carrier phase value on the basis of the check result.

A computer program product including software instructions directly loadable into an internal memory of a digital computer, which, when executed, performs a process including:

• receiving at least a satellite signal transmitted from a satellite;
• computing a carrier phase value calculation on a basis of accumulated coherent GNSS signal components derived from the satellite signal by performing a phase computation;
• obtaining a synthetic pilot signal at a first frequency from the accumulated coherent GNSS signal components;
• obtaining a bit estimate of the accumulated coherent GNSS signal components at a second frequency higher than the first frequency and corresponding to the frequency of the accumulated coherent GNSS signal components;
• resolving a Carrier Phase observable Half Cycle Ambiguity resolution on the synthetic pilot signal by:
• estimating a pilot polarity;
• estimating a data polarity from the bit estimate;
• checking if the pilot polarity and data polarity are equal or different and outputting a corresponding check result as polarity information;
• and
• performing an adjustment of a computed carrier phase value on the basis of the check result.