Umut Orguner

Department of Electrical and Electronics Engineering
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An Approximate MSE Expression for Maximum Likelihood and Other Implicitly Defined Estimators of Non-Random Parameters
Mehmetcik, Erdal; Orguner, Umut; Candan, Çağatay (2023-03-01)
© 2022 Elsevier B.V.An approximate mean square error (MSE) expression for the performance analysis of implicitly defined estimators of non-random parameters is proposed. An implicitly defined estimator (IDE) declares the m...
Multi-Ellipsoidal Extended Target Tracking With Variational Bayes Inference
Tuncer, Barkın; Orguner, Umut; Özkan, Emre (2022-01-01)
In this work, we propose a novel extended target tracking algorithm, which is capable of representing a target or a group of targets with multiple ellipses. Each ellipse is modeled by an unknown symmetric positive-definite...
Association and Fusion of Range-Azimuth Tracks
Balci, Ali Emre; Şahin, Kurtuluş Kerem; Kumru, Firat; Pektas, Fatih; Özkan, Emre; Orguner, Umut (2022-01-01)
In this paper, novel association and fusion methods for range-azimuth tracks are proposed. The association method requires calculating the distance between two tracks that lack elevation information. An iterative algorithm...
A Model Selection criterion for the Mixture Reduction problem based on the Kullback-Leibler Divergence
D'Ortenzio, Alessandro; Manes, Costanzo; Orguner, Umut (2022-01-01)
In order to be properly addressed, many practical problems require an accurate stochastic characterization of the involved uncertainties. In this regard, a common approach is the use of mixtures of parametric densities whi...
An Optimal Transport Perspective on Gamma Gaussian Inverse-Wishart Mixture Reduction
D'Ortenzio, Alessandro; Manes, Costanzo; Orguner, Umut (2022-01-01)
Recent advances in the Optimal Transport theory allow to rewrite several known problems in a neat way, while providing a more general perspective. When dealing with mixture densities, or in general with intensities, such a...
Decorrelation of Previously Communicated Information for an Interacting Multiple Model Filter
Acar, Duygu; Orguner, Umut (2021-02-01)
In a sensor network compensation of the correlated information caused by previous communication is of utmost interest for distributed estimation. In this article, we investigate an information decorrelation approach that c...
Performance limits for the amplitude estimation of power system harmonics & interharmonics
Altintasi, Cagri; Orguner, Umut; Salor, Ozgul (Institution of Engineering and Technology (IET), 2020-10-01)
In this study, the problem of amplitude estimation of (inter)harmonics is investigated. Specifically performance limits are provided for the accuracy of unbiased amplitude estimation algorithms and for the analysis window ...
Slow moving target detection for airborne radar systems by dynamic programming on SAR images
Gurer, Gorkem; Koc, Sencer; Candan, Çağatay; Orguner, Umut (2019-04-01)
A dynamic programming based approach is proposed to detect slow moving, low reflectivity targets for airborne radar systems. The suggested method utilizes the reflectivity amplitudes of the SAR image, possibly containing m...
Nonlinear Decentralized Data Fusion with Generalized Inverse Covariance Intersection
Noack, Benjamin; Orguner, Umut; Hanebeck, Uwe D. (2019-01-01)
Decentralized data fusion is a challenging task even for linear estimation problems. Nonlinear estimation renders data fusion even more difficult as dependencies among the nonlinear estimates require complicated parameteri...
Bacharach, Lucien; Fritsche, Carsten; Orguner, Umut; Chaumette, Eric (2019-01-01)
It has been shown lately that any "standard" Bayesian lower bound (BLB) on the mean squared error (MSE) of the Weiss-Weinstein family (WWF) admits a "tighter" form which upper bounds the "standard" form. Applied to the Bay...
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