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Robust Estimates of Covariance Matrices in the Large Dimensional Regime.
- Source :
- IEEE Transactions on Information Theory; Nov2014, Vol. 60 Issue 11, p7269-7278, 10p
- Publication Year :
- 2014
-
Abstract
- This paper studies the limiting behavior of a class of robust population covariance matrix estimators, originally due to Maronna in 1976, in the regime where both the number of available samples and the population size grow large. Using tools from random matrix theory, we prove that, for sample vectors made of independent entries having some moment conditions, the difference between the sample covariance matrix and (a scaled version of) such robust estimator tends to zero in spectral norm, almost surely. This result can be applied to various statistical methods arising from random matrix theory that can be made robust without altering their first order behavior. [ABSTRACT FROM PUBLISHER]
- Subjects :
- COVARIANCE matrices
RANDOM matrices
STATISTICS
ESTIMATION theory
INFORMATION theory
Subjects
Details
- Language :
- English
- ISSN :
- 00189448
- Volume :
- 60
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Information Theory
- Publication Type :
- Academic Journal
- Accession number :
- 99041670
- Full Text :
- https://doi.org/10.1109/TIT.2014.2354045