A novel unambiguous tracking method for Sine-BOC(2n, n) modulated signals

Because of the multiple side peaks in the Binary Offset Carrier (BOC) autocorrelation function (ACF), the probability of locking on a side peak will be generated in BOC code tracking process for next generation of global navigation satellite system (GNSS) receivers. A novel unambiguous tracking method based on an ideal reference function is proposed in this paper to remove the ambiguity problem. This method is suitable for Sine-BOC(2n, n) modulated signals, which is a specific family of BOC modulated signal for modernized GPS M-code signal and future Galileo. The theoretical and simulation results indicate that the proposed method completely removes the side-peaks from autocorrelation function while maintaining the sharp main peak, and the performance of multipath mitigation is also improved effectively with respect to the conventional BOC tracking methods.