ASPeCT: Unambiguous sine-BOC(n,n) acquisition/tracking technique for navigation applications

Abstract

This article presents a new tracking technique for sine-BOC(n, n) (or Manchester encoded) ranging signals, which will most likely be part of the new European Global Navigation Satellite System (GNSS), Galileo, signal plan. When traditional sine-BOC(n, n) tracking is considered, although offering excellent performance compared with current signals, it has the main drawback of potentially giving biased measurements. The new method presented herein allows the removal of this threat while maintaining the same level of performance. An adapted version of this technique can also be used for acquisition purposes.

GNSS Signals Acquisition and Tracking in Unfavorable Environment

“…Consequently, several side peaks cancellation techniques were also proposed in the literature. As examples, we can cite Autocorrelation Side-Peak Cancellation Technique (ASPeCT) [22], Sidelobes Cancellation Method (SCM) [23], and General Removing Ambiguity via Side Peak Suppression (GRASS) method for only BOCsin signals [24]. We can mention also Simultaneous Perturbation Stochastic Approximation (SPSA) for BOCcos signals [25], No Central Peak ACF for BOCsin signals [26], Pseudo Correlation Function method for MBOC signals [24], Combined Correlation Functions method for BOCsin/cos, CBOC and Alternate BOC signals [27] and BOC-PRN (Pseudo Random Noise) method for BOCsin/cos signals [28].…”

Resource-efficient acquisition architecture for BOC-modulated signals

“…To get rid of the ambiguous problem, a number of acquisition techniques for the BOC signal has been introduced [3,4,5,6]. Most of those works [3,4,5] focus on mitigating the side peaks of autocorrelation function.…”

“…Most of those works [3,4,5] focus on mitigating the side peaks of autocorrelation function. While those works increase the complexity that do not suit for coarse acquisition.…”

A novel acquisition scheme for Galileo E1 OS signals

“…ASPeCT method combines two kinds of autocorrelation functions to formulate a new one. After that, the new autocorrelation function still has small side peaks [2].…”