ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Unitary Unambiguous Tracking Method Based on Combined Correlation Functions for BOC Modulated Signals
Received date: 2013-10-12
Revised date: 2014-03-05
Online published: 2014-03-25
Supported by
National Natural Science Foundation of China (61179004,61179005)
In order to solve the ambiguous tracking problem for binary offset carrier (BOC) modulated signals which are used in global navigation satellite system (GNSS), a unitary unambiguous tracking method which is suitable for all kinds of BOC modulated signals is proposed to solve the ambiguous tracking problem. Firstly, the concept of step-shape bits vector is proposed to obtain a unified signal expression. Then, a formula of the cross-correlation function based on step-shape bits vector is derived. Finally, an unambiguous tracking method is proposed based on the idea of combined correlation functions. Simulation results indicate that the proposed method can deal with all kinds of BOC modulated signals including composite and complex ones with different phases or orders. An unambiguous correlated function with narrow single peak can be obtained by the proposed method. Furthermore, the anti-noise and multipath mitigation performance of proposed method are analyzed and the proposed method has better performance in anti-noise mitigation than the traditional unambiguous tracking methods.
REN Jiawei , YANG Guitong , JIA Weimin , YAO Minli . Unitary Unambiguous Tracking Method Based on Combined Correlation Functions for BOC Modulated Signals[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(7) : 2031 -2040 . DOI: 10.7527/S1000-6893.2014.0012
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