Resumo

LEE, Y. et al. An Unambiguous Tracking Scheme Using Partial-Pulses for BOC Signals. J. appl. res. technol [online]. 2014, vol.12, n.6, pp.1103-1114. ISSN 2448-6736.

The recent researches on the tracking of binary offset carrier (BOC) modulated signals have been studied focusing on resolving the ambiguity problem caused by the multiple side-peaks in BOC autocorrelation. In this paper, we propose a novel unambiguous BOC tracking scheme with an improved tracking performance by using partial-pulses of BOC signals. Firstly, we observe that a sub-carrier consists of two partial rectangular pulses referred to as partial-pulses, and then, generate multiple partial-correlations composing the BOC autocorrelation. Finally, a correlation function with no side-peak is constructed by combining the partial-correlations, and then, a delay lock loop employing the proposed unambiguous correlation function adjusts the phase of the local BOC signals. From numerical results, it is confirmed that the proposed scheme provides a better tracking performance than the conventional schemes in terms of the tracking error standard deviation.

Palavras-chave : Binary offset carrier (BOC); global navigation satellite systems (GNSSs); tracking, side-peaks; ambiguity problem.

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