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Title:Injecting noise for analysing the stability of ICA components
Authors: Stefan Harmeling ; Frank Meinecke ; Klaus-Robert Muller
Date:Feb 2004
Publication Title:Signal Processing
Publication Type:Journal Article Publication Status:Published
Volume No:84(2) Page Nos:255-266
Usually, noise is considered to be destructive. We present a new method that constructively injects noise to assess the reliability and the grouping structure of empirical ICA component estimates. Our method can be viewed as a Monte-Carlo-style approximation of the curvature of some performance measure at the solution. Simulations show that the true root-mean-squared angle distances between the real sources and the source estimates can be approximated well by our method. In a toy experiment, we see that we are also able to reveal the underlying grouping structure of the extracted ICA components. Furthermore, an experiment with fetal ECG data demonstrates that our approach is useful for exploratory data analysis of real-world data.
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Bibtex format
author = { Stefan Harmeling and Frank Meinecke and Klaus-Robert Muller },
title = {Injecting noise for analysing the stability of ICA components},
journal = {Signal Processing},
publisher = {Elsevier},
year = 2004,
month = {Feb},
volume = {84(2)},
pages = {255-266},
doi = {10.1016/j.sigpro.2003.10.009},

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