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Sensors 2016, 16(8), 1194; doi:10.3390/s16081194

A Design Method of Code Correlation Reference Waveform in GNSS Based on Least-Squares Fitting

College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
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Author to whom correspondence should be addressed.
Received: 23 May 2016 / Revised: 16 July 2016 / Accepted: 19 July 2016 / Published: 29 July 2016
(This article belongs to the Section Remote Sensors)

Abstract

The multipath effect is one of the main error sources in the Global Satellite Navigation Systems (GNSSs). The code correlation reference waveform (CCRW) technique is an effective multipath mitigation algorithm for the binary phase shift keying (BPSK) signal. However, it encounters the false lock problem in code tracking, when applied to the binary offset carrier (BOC) signals. A least-squares approximation method of the CCRW design scheme is proposed, utilizing the truncated singular value decomposition method. This algorithm was performed for the BPSK signal, BOC(1,1) signal, BOC(2,1) signal, BOC(6,1) and BOC(7,1) signal. The approximation results of CCRWs were presented. Furthermore, the performances of the approximation results are analyzed in terms of the multipath error envelope and the tracking jitter. The results show that the proposed method can realize coherent and non-coherent CCRW discriminators without false lock points. Generally, there is performance degradation in the tracking jitter, if compared to the CCRW discriminator. However, the performance promotions in the multipath error envelope for the BOC(1,1) and BPSK signals makes the discriminator attractive, and it can be applied to high-order BOC signals. View Full-Text
Keywords: GNSS; multipath; BOC; least-squares; SVD; CCRW GNSS; multipath; BOC; least-squares; SVD; CCRW
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xu, C.; Liu, Z.; Tang, X.; Wang, F. A Design Method of Code Correlation Reference Waveform in GNSS Based on Least-Squares Fitting. Sensors 2016, 16, 1194.

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