Unambiguous Signal Acquisition Based On Recombination of Sub-Correlations of BOC Signals

Authors: Hongdeuk Kim, Youngpo Lee, Seokho Yoon

Abstract:

Due to side-peaks of autocorrelation function, the binary offset carrier (BOC) signal acquisition suffers from an ambiguity when one of the side-peaks is acquired. In this paper, we first analyze that the BOC autocorrelation is made up of the sum of subcorrelations, and then, remove the side-peaks causing the ambiguity by recombining the sub-correlations. The proposed scheme is shown to remove the side-peaks completely. From numerical results, it is confirmed that the proposed scheme outperforms the conventional schemes in terms of the receiver operating characteristic and mean acquisition time.

Keywords: Binary offset carrier (BOC), acquisition, ambiguity problem, side-peak.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1087722

References:

[1] E. Kaplan and C. Hegarty, Understanding GPS: Principles and Applications, 2nd ED., Norwood: Artech House, 2006.
[2] E. S. Lohan, A. Lakhzouri, and M. Renfors, “Binary-offset-carrier modulation techniques with applications in satellite navigation systems,” Wireless Commun. Mobile Computing, vol. 7, no. 6, pp. 767-779, Aug. 2007.
[3] M. Zahidul, H. Bhuiyan, E. S. Lohan, and M. Renfors, “Code tracking algorithms for mitigating multipath effects in fading channels for satellitebased positioning,” Euasip Journal on Advances in Signal Process, vol. 2008, aricle ID. 863629, 2008.
[4] J. A. Avila-Rodriguez, “On generalized signal waveforms for satellite navigation,” Ph.D. dissertation, Dept. Aer. Engineer., University of Munich, Munich, Germany, 2008.
[5] W. Liu, G. Du, X. Zhan, and C. Zhai, “MSK-binary coded symbol modulations for global navigation satellite systems,” IEICE Electron. Express, vol. 7, no. 6, pp. 421-427, Mar. 2010.
[6] J. Wu and A. G. Dempster, “Applying a BOC-PRN discriminator to cosine phased BOC(fs,fc) modulation,” Electron. Lett., vol. 45, no. 13, pp. 689- 690, June 2009.
[7] N. Martin, V. Leblond, G. Guillotel, and V. Heiries, “BOC(x,y) signal acquisition techniques and performances,” in Proc. ION GPS/GNSS, pp. 188-198, Portland, OR, Sep. 2003.
[8] A. Burian, E. S. Lohan, V. Lehtinen, and M. K. Renfors, “Complexity considerations for unambiguous acquisition of Galileo signals,” in Proc. Workshop on Positioning, Navig., and Commun., pp. 65-74, Hannover, Germnay, Mar. 2006.
[9] E. S. Lohan, A. Burian, and M. Renfors, “Low-complexity unambiguous acquisition methods for BOC-modulated CDMA signals,” Int. Journal of Satell. Commun. Networking, vol. 26, no. 6, pp. 503-522, Nov.-Dec. 2008.
[10] O. Julien, C. Macabiau, M. E. Cannon, and G. Lachapelle, “ASPeCT: unambiguous sine-BOC(n, n) acquisition/tracking technique for navigation applications,” IEEE Trans. Aer., Electron. Syst., vol. 43, no. 1, pp. 150-162, Jan. 2007.
[11] Z. Yao, M. Lu, and Z. Feng, “Unambiguous sine-phased binary offset carrier modulated signal acquisition technique,” IEEE Trans. wireless Commun., vol. 9, no. 2, pp. 577-580, Feb. 2010.
[12] F. D. Nunes, M, G. Sousa, and J. M. N. Leitao, “Gating functions of for multipath mitigation in GNSS BOC signals,” IEEE Trans. Aer., Electron. Syst., vol. 43, no. 3, pp. 951-964, July 2007.
[13] E. S. Lohan, A. Lakhzouri, and M. Renfors, “Feedforward delay estimators in adverse multipath propagation for Galileo and modernized GPS signals,” Eurasip Journal on Applied Signal Process., vol. 2006, article ID. 50971, 2006.
[14] European Commission, European GNSS (Galileo) open service signal in space interface control document (OS SIS ICD). (Online). Available: http://ec.europa.eu/enterprise/policies/space/galileo/open-service, Feb. 2010.