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Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop
In order to track the carrier phases of Global Navigation Satellite Systems (GNSS) signals in signal degraded environments, a dual antenna joint carrier tracking loop is proposed and evaluated. This proposed tracking loop processes inputs from two antennas, namely the master antenna and the slave an...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4634426/ https://www.ncbi.nlm.nih.gov/pubmed/26437415 http://dx.doi.org/10.3390/s151025399 |
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author | Guo, Wenfei Lin, Tao Niu, Xiaoji Shi, Chuang Zhang, Hongping |
author_facet | Guo, Wenfei Lin, Tao Niu, Xiaoji Shi, Chuang Zhang, Hongping |
author_sort | Guo, Wenfei |
collection | PubMed |
description | In order to track the carrier phases of Global Navigation Satellite Systems (GNSS) signals in signal degraded environments, a dual antenna joint carrier tracking loop is proposed and evaluated. This proposed tracking loop processes inputs from two antennas, namely the master antenna and the slave antenna. The master antenna captures signals in open-sky environments, while the slave antenna capture signals in degraded environments. In this architecture, a Phase Lock Loop (PLL) is adopted as a master loop to track the carrier phase of the open-sky signals. The Doppler frequency estimated by this master loop is utilized to assist weak carrier tracking in the slave loop. As both antennas experience similar signal dynamics due to satellite motion and clock frequency variations, a much narrower loop bandwidth and possibly a longer coherent integration can be adopted to track the weak signals in slave channels, by utilizing the Doppler aid from master channels. PLL tracking performance is affected by the satellite/user dynamics, clock instability, and thermal noise. In this paper, their impacts on the proposed phase tracking loop are analyzed and verified by both simulation and field data. Theoretical analysis and experimental results show that the proposed loop structure can track degraded signals (i.e., 18 dB-Hz) with a very narrow loop bandwidth (i.e., 0.5 Hz) and a TCXO clock. |
format | Online Article Text |
id | pubmed-4634426 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-46344262015-11-23 Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop Guo, Wenfei Lin, Tao Niu, Xiaoji Shi, Chuang Zhang, Hongping Sensors (Basel) Article In order to track the carrier phases of Global Navigation Satellite Systems (GNSS) signals in signal degraded environments, a dual antenna joint carrier tracking loop is proposed and evaluated. This proposed tracking loop processes inputs from two antennas, namely the master antenna and the slave antenna. The master antenna captures signals in open-sky environments, while the slave antenna capture signals in degraded environments. In this architecture, a Phase Lock Loop (PLL) is adopted as a master loop to track the carrier phase of the open-sky signals. The Doppler frequency estimated by this master loop is utilized to assist weak carrier tracking in the slave loop. As both antennas experience similar signal dynamics due to satellite motion and clock frequency variations, a much narrower loop bandwidth and possibly a longer coherent integration can be adopted to track the weak signals in slave channels, by utilizing the Doppler aid from master channels. PLL tracking performance is affected by the satellite/user dynamics, clock instability, and thermal noise. In this paper, their impacts on the proposed phase tracking loop are analyzed and verified by both simulation and field data. Theoretical analysis and experimental results show that the proposed loop structure can track degraded signals (i.e., 18 dB-Hz) with a very narrow loop bandwidth (i.e., 0.5 Hz) and a TCXO clock. MDPI 2015-10-01 /pmc/articles/PMC4634426/ /pubmed/26437415 http://dx.doi.org/10.3390/s151025399 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Guo, Wenfei Lin, Tao Niu, Xiaoji Shi, Chuang Zhang, Hongping Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop |
title | Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop |
title_full | Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop |
title_fullStr | Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop |
title_full_unstemmed | Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop |
title_short | Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop |
title_sort | design and performance evaluation of a dual antenna joint carrier tracking loop |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4634426/ https://www.ncbi.nlm.nih.gov/pubmed/26437415 http://dx.doi.org/10.3390/s151025399 |
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