Patent ID: 8755472

Claim:
A method of tracking a Global Positioning Satellite (GPS) signal, the method comprising: executing a pull-in stage by setting a center frequency of a phase-locked loop (PLL) having an initial bandwidth to a Doppler frequency of the GPS signal; determining whether the PLL has converged in a first occurrence over an initial integration time; determining whether the PLL has false convergence by comparing a power of an in-phase component to a power of a quadrature component of the GPS signal if the PLL has converged in the first occurrence; executing a transition stage by decreasing the initial bandwidth and increasing the initial integration time if the PLL does not have false convergence; determining whether the PLL has converged in a second occurrence after execution of the transition stage; and executing a tracking stage by fixing a decreased bandwidth for the PLL and an increased integration time if the PLL has converged in the second occurrence.