Neural Networks for Spectral Analysis of Unevenly Sampled Data

Details Neural Networks for Spectral Analysis of Unevenly Sampled Data Neural Networks for Spectral Analysis of Unevenly Sampled Data

1999-06-10

arxiv.org/abs/astro-ph/9906181v2

Astronomy and Astrophysics

Astrophysics

9 pages, wicsbook.sty macro file, accepted for publication in the proceedings of the 11th Italian Workshop on Neural Networks,

Scientific paper

In this paper we present a neural network based estimator system which performs well the frequency extraction from unevenly sampled signals. It uses an unsupervised Hebbian nonlinear neural algorithm to extract the principal components which, in turn, are used by the MUSIC frequency estimator algorithm to extract the frequencies. We generalize this method to avoid an interpolation preprocessing step and to improve the performance by using a new stop criterion to avoid overfitting. The experimental results are obtained comparing our methodology with the others known in literature.

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