Global positioning system receiver for monitoring the satellite transmissions and for reducing the effects of multipath error on coded signals and carrier phase measurements

An apparatus for processing at least one satellite-based navigation broadcast signal that includes a carrier frequency signal modulated by a Pseudo Random Code (PRN) signal, comprising:

• an intermediate frequency (IF) processor configured to downconvert the broadcast signal to generate a first channel signal;
• an angle rotator configured to further downconvert the first channel signal, to thereby recover the PRN signal from the broadcast signal;
• a signal generator configured to generate N gated PRN signals, wherein the N gated PRN signals are generated based on a local replica PRN signal time-divided by M intervals within a chip period of the local replica PRN signal, and N and M are positive integers;
• a first plurality of correlators each of which is configured to multiply a respective one of N gated PRN signals with a first phase signal of the PRN signal to generate a respective correlation value in a first plurality correlation values;
• a carrier lock loop coupled to the angle rotator and configured to recover the carrier frequency signal;
• and
• a processor configured to adjust timing of the carrier lock loop based on the first plurality of correlation values in order to accurately track the carrier frequency signal.