Snapshot GNSS receiver and method using super-long coherent integration and fractional fourier transform

A snapshot receiver for determining position information, said snapshot receiver comprising:

• a receiver configured to receive a GNSS signal from a satellite, said GNSS signal having at least one quality issue;
• a correlator configured to correlate said GNSS signal using time-domain integration of a plurality of samples of said GNSS signal, to thereby produce a correlated signal;
• a transformer configured to apply a Fractional Fourier Transform (FrFT) process to said correlated signal to thereby produce an estimated Doppler rate;
• and
• a super-resolution measurement (SRM) unit configured to receive the estimated Doppler rate, determine error values of said estimated Doppler rate, and determine a distance between said snapshot receiver and said satellite, based on said estimated Doppler rate;
• and
• a navigator configured to determine said position information based on said error values and said distance, said position information detailing a geographic position of said snapshot receiver, and said position information being an output of said snapshot receiver,
• wherein said at least one quality issue is at least one of signal interruption, signal attenuation, and non-line-of-sight (NLOS) interference,
• and wherein said correlating and said FrFT process compensate for said at least one quality issue in said GNSS signal.