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Structured Covariance Matrix Estimation: A Parametric Approach
KTH, Superseded Departments, Signals, Sensors and Systems.ORCID iD: 0000-0002-6855-5868
KTH, Superseded Departments, Signals, Sensors and Systems.ORCID iD: 0000-0003-2298-6774
2000 (English)In: Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE , 2000, 3172-3175 p.Conference paper, Published paper (Refereed)
Abstract [en]

The problem of estimating a positive semi-definite Toeplitz covariance matrix consisting of a low rank matrix plus a scaled identity from noisy data arises in many applications. We propose a computationally attractive (noniterative) covariance matrix estimator with certain optimality properties. For example, under suitable assumptions the proposed estimator achieves the Cramer-Rao lower bound on the covariance matrix parameters. The resulting covariance matrix estimate is also guaranteed to possess all of the structural properties of the true covariance matrix. Previous approaches to this problem have either resulted in computationally unattractive iterative solutions or have provided estimates that only satisfy some of the structural relations

Place, publisher, year, edition, pages
IEEE , 2000. 3172-3175 p.
Keyword [en]
Approximation methods, Covariance matrix, Gaussian distribution, Iterative methods, Maximum likelihood estimation, Minimization methods, Optimization methods, Sensor systems, Signal processing, Signal to noise ratio
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-82688DOI: 10.1109/ICASSP.2000.861211OAI: oai:DiVA.org:kth-82688DiVA: diva2:498511
Conference
ICASSP Istanbul, Turkey, June 2000
Note
NR 20140805Available from: 2012-02-12 Created: 2012-02-12 Last updated: 2012-04-02Bibliographically approved

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Jansson, MagnusOttersten, Björn

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