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Generalized Theory and Decoupled Evaluation Criteria for Unmatched Despreading of Modernized GNSS Signals

In order to provide better navigation service for a wide range of applications, modernized global navigation satellite systems (GNSS) employs increasingly advanced and complicated techniques in modulation and multiplexing of signals. This trend correspondingly increases the complexity of signal desp...

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Detalles Bibliográficos
Autores principales: Zhang, Jiayi, Yao, Zheng, Lu, Mingquan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4970171/
https://www.ncbi.nlm.nih.gov/pubmed/27447648
http://dx.doi.org/10.3390/s16071128
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author Zhang, Jiayi
Yao, Zheng
Lu, Mingquan
author_facet Zhang, Jiayi
Yao, Zheng
Lu, Mingquan
author_sort Zhang, Jiayi
collection PubMed
description In order to provide better navigation service for a wide range of applications, modernized global navigation satellite systems (GNSS) employs increasingly advanced and complicated techniques in modulation and multiplexing of signals. This trend correspondingly increases the complexity of signal despreading at the receiver when matched receiving is used. Considering the numerous low-end receiver who can hardly afford such receiving complexity, it is feasible to apply some receiving strategies, which uses simplified forms of local despreading signals, which is termed unmatched despreading. However, the mismatch between local signal and received signal causes performance loss in code tracking, which is necessary to be considered in the theoretical evaluation methods of signals. In this context, we generalize the theoretical signal evaluation model for unmatched receiving. Then, a series of evaluation criteria are proposed, which are decoupled from unrelated influencing factors and concentrates on the key factors related to the signal and its receiving, thus better revealing the inherent performance of signals. The proposed evaluation criteria are used to study two GNSS signals, from which constructive guidance are derived for receivers and signal designer.
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spelling pubmed-49701712016-08-04 Generalized Theory and Decoupled Evaluation Criteria for Unmatched Despreading of Modernized GNSS Signals Zhang, Jiayi Yao, Zheng Lu, Mingquan Sensors (Basel) Article In order to provide better navigation service for a wide range of applications, modernized global navigation satellite systems (GNSS) employs increasingly advanced and complicated techniques in modulation and multiplexing of signals. This trend correspondingly increases the complexity of signal despreading at the receiver when matched receiving is used. Considering the numerous low-end receiver who can hardly afford such receiving complexity, it is feasible to apply some receiving strategies, which uses simplified forms of local despreading signals, which is termed unmatched despreading. However, the mismatch between local signal and received signal causes performance loss in code tracking, which is necessary to be considered in the theoretical evaluation methods of signals. In this context, we generalize the theoretical signal evaluation model for unmatched receiving. Then, a series of evaluation criteria are proposed, which are decoupled from unrelated influencing factors and concentrates on the key factors related to the signal and its receiving, thus better revealing the inherent performance of signals. The proposed evaluation criteria are used to study two GNSS signals, from which constructive guidance are derived for receivers and signal designer. MDPI 2016-07-20 /pmc/articles/PMC4970171/ /pubmed/27447648 http://dx.doi.org/10.3390/s16071128 Text en © 2016 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 (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Jiayi
Yao, Zheng
Lu, Mingquan
Generalized Theory and Decoupled Evaluation Criteria for Unmatched Despreading of Modernized GNSS Signals
title Generalized Theory and Decoupled Evaluation Criteria for Unmatched Despreading of Modernized GNSS Signals
title_full Generalized Theory and Decoupled Evaluation Criteria for Unmatched Despreading of Modernized GNSS Signals
title_fullStr Generalized Theory and Decoupled Evaluation Criteria for Unmatched Despreading of Modernized GNSS Signals
title_full_unstemmed Generalized Theory and Decoupled Evaluation Criteria for Unmatched Despreading of Modernized GNSS Signals
title_short Generalized Theory and Decoupled Evaluation Criteria for Unmatched Despreading of Modernized GNSS Signals
title_sort generalized theory and decoupled evaluation criteria for unmatched despreading of modernized gnss signals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4970171/
https://www.ncbi.nlm.nih.gov/pubmed/27447648
http://dx.doi.org/10.3390/s16071128
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