Unambiguous acquisition explained

Unambiguous acquisition is the acquisition of GNSS signals that present ambiguities in their autocorrelation function, namely the signals that are modulated with a modulation belonging to the Binary Offset Carrier modulation class.

Unambiguous acquisition methods have been widely studied, for example in and .

Further reading

• A. Burian, E.S. Lohan, and M. Renfors, Efficient Delay Tracking Methods with Sidelobes Cancellation for BOC-Modulated Signals, EURASIP Journal on Wireless Communications and Networking, Volume 2007 (2007), Article ID 72626,
• M. Navarro Gallardo, G. Seco-Granados, G. López-Risueño, M. Crisci, "Code Smoothing for BOC Ambiguity Mitigation", Proc. International Conference on Localization and GNSS (ICL-GNSS), 2013
• O. Julien, C. Macabiau, M. Cannon, and G. Lachapelle, “BOC signal acquisition and tracking method and apparatus.” US Patent Application Publication 2005/0270997 A1, Dec 2005
• F. Benedetto, G. Giunta, E. S. Lohan, and M. Renfors, “A Fast Unambiguous Acquisition Algorithm for BOC-Modulated Signals”, IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 62, NO. 3, MARCH 2013
• Z. Yao, “Unambiguous technique for multiplexed binary offset carrier modulated signals tracking,” IEEE Signal Process. Lett., vol. 16, no. 7, pp. 608–611, 2009.