期刊
ANNALS OF STATISTICS
卷 51, 期 3, 页码 1427-1451出版社
INST MATHEMATICAL STATISTICS-IMS
DOI: 10.1214/23-AOS2300
关键词
Asymptotic normality; linear spectral statistics; general sample covariance matrix; ultra-dimension; matrix white noise; separable covariance
The paper derives the asymptotic normality for a large family of eigenvalue statistics of a general sample covariance matrix under the ultrahigh-dimensional setting. Based on this result, the covariance matrix test problem is extended to the new ultra-high-dimensional context and applied to test a matrix-valued white noise. Simulation experiments are conducted to investigate the finite-sample properties of the general asymptotic normality of eigenvalue statistics and the two developed tests.
The asymptotic normality for a large family of eigenvalue statistics of a general sample covariance matrix is derived under the ultrahigh-dimensional setting, that is, when the dimension to sample size ratio p/n & RARR; & INFIN;. Based on this CLT result, we extend the covariance matrix test problem to the new ultra-high-dimensional context, and apply it to test a matrix-valued white noise. Simulation experiments are conducted for the investigation of finite-sample properties of the general asymptotic normality of eigenvalue statistics, as well as the two developed tests.
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