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Blind deconvolution of covariance matrix inverses for autoregressive processes

Golyandina, Nina and Zhigljavsky, Anatoly 2020. Blind deconvolution of covariance matrix inverses for autoregressive processes. Linear Algebra and its Applications 593 , pp. 188-211. 10.1016/j.laa.2020.02.005

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Matrix C can be blindly deconvoluted if there exist matrices A and B such that C = A * B, where * denotes the operation of matrix convolution. We study the prob- lem of matrix deconvolution in the case where matrix C is proportional to the inverse of the autocovariance matrix of an autoregressive process. We show that the deconvolution of such matrices is important in problems of Hankel structured low-rank approximation (HSLRA). In the cases of autoregressive models of orders one and two, we fully charac- terize the range of parameters where such deconvolution can be performed and provide construction schemes for performing deconvolutions. We also consider general autoregres- sive models of order p, where we prove that the deconvolution C = A * B does not exist if the matrix B is diagonal and its size is larger than p.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Mathematics
Publisher: Elsevier
ISSN: 0024-3795
Funders: no
Date of First Compliant Deposit: 26 February 2020
Date of Acceptance: 5 February 2020
Last Modified: 08 Feb 2021 02:34

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