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Applying Back-propagation Neural Networks to GDOP Approximation

Published online by Cambridge University Press:  14 February 2002

Dah-Jing Jwo
Affiliation:
Institute of Maritime Technology, National Taiwan Ocean University
Kuo-Pin Chin
Affiliation:
Institute of Maritime Technology, National Taiwan Ocean University

Abstract

In this paper, back-propagation (BP) neural networks (NN) are applied to the GPS satellite Geometric Dilution of Precision (GDOP) approximation. The methods using BPNN are general enough to be applicable regardless of the number of satellite signals being processed by the receiver. BPNN is employed to learn the functional relationships firstly, between the entries of a measurement matrix and the eigenvalues and thus generate GDOP, and secondly, between the entries of a measurement matrix and the GDOP, both without inverting a matrix. Consequently, two sets of entries and two sets of output variables, respectively, are used that in total yield four types of mapping architectures. Simulation results from these four architectures are presented. The performance and computational benefit of neural network-based GDOP approximation are explored.

Keywords

Type
Research Article
Copyright
© 2002 The Royal Institute of Navigation

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