PLL Unwrapping Structures using Polynomial Prediction Algorithm for Noisy Carrier Phase Tracking

S. Roche, S. Bidon, O. Besson, M. Monnerat, L. Ries, P. Thevenon

Abstract:	Since the rise of technologies using GNSS positioning systems, development of carrier phase tracking receiver for precise point positioning in hostile environments is becoming one of the most important challenges for future satellite navigation applications. Because phase locked loops (PLL) that track carrier phase suffer from cycle slips phenomenon, noise robustness of the formers has to be reinforced if one wants to use precise positioning techniques in the widest range of challenging environments. The purpose of this article is to propose a new PLL design using a phase unwrapping algorithm that effectively corrects cycle slips due to phase noise in low CN0. Unlike phase unwrapping algorithms using a threshold approach for cycle slips detection, the algorithm implemented in our PLL structure is based on a system of prediction and pre-compensation of the phase dynamic stress. In order to reduce the cycle slips and enforce noise robustness of phase tracking, this algorithm is adapted to tracking loops with the aim to propose two innovative PLL structures. A comparative study is performed to show the effectiveness of the two proposed structures in case of noisy environment.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	47 - 55
Cite this article:	Roche, S., Bidon, S., Besson, O., Monnerat, M., Ries, L., Thevenon, P., "PLL Unwrapping Structures using Polynomial Prediction Algorithm for Noisy Carrier Phase Tracking," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 47-55.
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