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Non-Gaussian Component Analysis: New Ideas, New Proofs, New Applications

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  • Vladimir Panov
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    Abstract

    In this article, we present new ideas concerning Non-Gaussian Component Analysis (NGCA). We use the structural assumption that a high-dimensional random vector X can be represented as a sum of two components - a lowdimensional signal S and a noise component N. We show that this assumption enables us for a special representation for the density function of X. Similar facts are proven in original papers about NGCA ([1], [5], [13]), but our representation differs from the previous versions. The new form helps us to provide a strong theoretical support for the algorithm; moreover, it gives some ideas about new approaches in multidimensional statistical analysis. In this paper, we establish important results for the NGCA procedure using the new representation, and show benefits of our method.

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    File URL: http://sfb649.wiwi.hu-berlin.de/papers/pdf/SFB649DP2010-026.pdf
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    Bibliographic Info

    Paper provided by Sonderforschungsbereich 649, Humboldt University, Berlin, Germany in its series SFB 649 Discussion Papers with number SFB649DP2010-026.

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    Length: 20 pages
    Date of creation: May 2010
    Date of revision:
    Handle: RePEc:hum:wpaper:sfb649dp2010-026

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    Keywords: dimension reduction; non-Gaussian components; EDR subspace; classification problem; Value at Risk;

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