Você está no menu de acessibilidade

Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/68044
Título: 
Multipath reduction from GPS double differences using wavelets: How far can we go?
Autor(es): 
De Souza, Eniuce Menezes
Instituição: 
Universidade Estadual Paulista (UNESP)
Resumo: 
Wavelets are being extensively used in Geodetic applications. In this paper, the Multi-Resolution Analysis (MRA) using wavelets is applied to pseudorange and carrier phase GPS double differences (DDs) in order to reduce multipath effects. The wavelets were already applied to GPS carrier phase DDs, but some questions remain: How good can be the results, and are all multipath effects reduced? The answers to these questions are discussed in this paper. Thus, the wavelet transform is used to decompose the DD signals, splitting them in lower resolution components. After the decomposition process, the wavelet shrinkage is performed by thresholding to eliminate the components relative to multipath effects. Then, the DD observation can be reconstructed. This new DD signal is used to perform the baseline processing. The daily multipath repeatability was verified. With the application of the proposed approach, the results showed that the reliability of the ambiguity resolution and accuracy of the results improved when compared with the standard procedure. Furthermore, the method showed to be very efficient computationally, because, it is not noticed, at practical level, difference in the time span between the processing with and without application of the proposed method. However, only the high frequency multipath was eliminated.
Data de publicação: 
1-Dez-2004
Citação: 
Proceedings of the 17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004, p. 2563-2571.
Duração: 
2563-2571
Palavras-chaves: 
  • Double differences (DD)
  • Multi-resolution analysis (MRA)
  • Multipath spectral analysis
  • Wavelet shrinkage
  • Algorithms
  • Computational methods
  • Frequency modulation
  • Geodesy
  • Multipath propagation
  • Signal to noise ratio
  • Wavelet transforms
  • Global positioning system
Fonte: 
https://www.ion.org/publications/abstract.cfm?articleID=5940
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/68044
Aparece nas coleções:Artigos, TCCs, Teses e Dissertações da Unesp

Não há nenhum arquivo associado com este item.
 

Itens do Acervo digital da UNESP são protegidos por direitos autorais reservados a menos que seja expresso o contrário.