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Almost sure localization of the eigenvalues in a Gaussian information plus noise model - Application to the spiked models
Abstract : Let Sigma(N) be a M x N random matrix defined by Sigma(N) = B(N) + sigma W(N) where B(N) is a uniformly bounded deterministic matrix and where W(N) is an independent identically distributed complex Gaussian matrix with zero mean and variance 1/N entries. The purpose of this paper is to study the almost sure location of the eigenvalues (lambda) over cap (1,N) >= ... >= (lambda) over cap (M,N) of the Gram matrix Sigma(N)Sigma(N)* when M and N converge to +infinity such that the ratio c(N) = M/N converges towards a constant c > 0. The results are used in order to derive, using an alternative approach, known results concerning the behaviour of the largest eigenvalues of Sigma(N)Sigma(N)* when the rank of B(N) remains fixed and M, N tend to +infinity.
https://hal-upec-upem.archives-ouvertes.fr/hal-00692258
Contributor : Philippe Loubaton <>
Submitted on : Sunday, April 29, 2012 - 4:43:10 PM
Last modification on : Wednesday, February 3, 2021 - 7:54:27 AM
Contributor : Philippe Loubaton <>
Submitted on : Sunday, April 29, 2012 - 4:43:10 PM
Last modification on : Wednesday, February 3, 2021 - 7:54:27 AM