Unambiguous sine-phased binary offset carrier modulated signal acquisition technique

GNSS Signals Acquisition and Tracking in Unfavorable Environment

“…As illustrated in this figure, we observe that all the S-curves are very close except for small differences around the maxima and minima that do not influence the tracking process. Note that the procedure that is used herein is similar to those of step-chips and BOC-PRN structures [28], [56], [57]. Figure 10 shows the process of implementing the input tape and the intermediate frequency filtering that is common to all three variants of our proposed method.…”

Unambiguous Processing Techniques of Binary Offset Carrier Modulated Signals

“…This technique is suitable for generic sin-BOC(kn,n) signals and it is convenient to implement. The detailed performance analysis of this technique can be found in (Yao et al, 2010a). This section puts its emphasis on the design process of this technique.…”

Side peak cancellation method for sine-BOC(m,n)-modulated GNSS signals

“…Even though it seems to be attractive in the ideal case, this later method presents severe performance degradation in the presence of MP with phase of 180°with respect to the line of sight (LOS). In [10][11][12], the authors have used the concept of the step-shape code symbol (SCS) signals, proposed first in [13], to propose three unambiguous methods given separately in [10][11][12]. The first one [10], which is applied for CBOC modulation signal in non-coherent tracking configuration, uses a discriminator based on a pseudo correlation function (PCF).…”

“…In addition, its ACF (PCF) is completely deformed in the presence of MP which is another limitation [14]. The second method, developed for sine-BOC(kn,n)-modulated signals, is called general removing ambiguity via side peak suppression (GRASS) technique [11]. Its principle consists of subtracting the cross-correlation function between the locally generated auxiliary SCS signal and the received sine-BOC signal from the ACF of the received sine-BOC-modulated signal.…”

“…Its principle consists of subtracting the cross-correlation function between the locally generated auxiliary SCS signal and the received sine-BOC signal from the ACF of the received sine-BOC-modulated signal. Nevertheless, the MP performances are more and more degraded as the modulation order M becomes higher (M > 2) [11]. Finally, the third SCS-based method, called PCF-based unambiguous delay-locked loop (PUDLL) [12], uses two local SCS signals that are separately crosscorrelated with the received sine-BOC(kn,n)-modulated signal.…”