Multiple Branch Delay Lock Loop Comparison for SinBOC(1,1) Signal Tracking in Multipath Environments

Xuan Hu, Elena Simona Lohan, Ingmar Groh, Stephan Sand, Markku Renfors

Abstract:	Multipath is an issue of paramount importance in global navigation satellite system (GNSS) context, and one of the dominant error sources for code tracking. This paper presents the basic idea of multiple branch delay lock loop (MBDLL) and some popular discriminator functions, such as least squares (LS) / weighted least squares (WLS) estimation, Newton-Raphson method and expectation maximization (EM) / space alternating generalized expectation (SAGE) estimation, applied now in the context of MBDLL. This paper focuses on the comparison between the above-mentioned algorithms for tracking Galileo binary offset carrier (BOC) signal, including both the tracking performance in multipath and the complexity. The tracking performance is assessed in terms of root mean squared error (RMSE) under the Galileo receiver analysis and design application (GRANADA) bit true software receiver simulator. The comparison results show that the MBDLL can give better tracking performance than the conventional narrow early minus late (NEML) DLL, at the cost of an increase in complexity.
Published in:	Proceedings of the 2009 International Technical Meeting of The Institute of Navigation January 26 - 28, 2009 Disney's Paradise Pier Hotel Anaheim, CA
Pages:	434 - 441
Cite this article:	Hu, Xuan, Lohan, Elena Simona, Groh, Ingmar, Sand, Stephan, Renfors, Markku, "Multiple Branch Delay Lock Loop Comparison for SinBOC(1,1) Signal Tracking in Multipath Environments," Proceedings of the 2009 International Technical Meeting of The Institute of Navigation, Anaheim, CA, January 2009, pp. 434-441.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In