Results 81 to 90 of about 25,920 (164)

A fast, preconditioned conjugate gradient Toeplitz solver [PDF]

A simple factorization is given of an arbitrary hermitian, positive definite matrix in which the factors are well-conditioned, hermitian, and positive definite.
Pan, Victor, Schrieber, Robert
core   +1 more source

Determinants and inverses of perturbed periodic tridiagonal Toeplitz matrices

Advances in Difference Equations, 2019
In this paper, we deal mainly with a class of periodic tridiagonal Toeplitz matrices with perturbed corners. By matrix decomposition with the Sherman–Morrison–Woodbury formula and constructing the corresponding displacement of matrices we derive the ...
Yunlan Wei, Xiaoyu Jiang, Zhaolin Jiang, Sugoog Shon   +3 more
doaj   +1 more source

Robust DOA estimation for two‐level nested arrays in unknown mutual coupling

Electronics Letters
Aiming at solving the problem that the capability of direction of arrival method for estimation of nested arrays decreases sharply under unknown mutual coupling, an iterative weighted low‐rank matrix reconstruction algorithm is proposed here.
Shun He, Xue Li, Bing Sun
doaj   +1 more source

Matrix representations of truncated Toeplitz operators

Journal of Mathematical Analysis and Applications, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Is every matrix similar to a Toeplitz matrix?

, 2022
[en] The theory of matrices is a very important field in the world of mathematics, which plays a central role in the study of a large variety of areas in pure and applied mathematics. Is is one of the first topics studied in the degree. I remember when I was studying the first course that I got fascinated by the fact that you can transform a matrix ...
openaire   +1 more source

Parameters estimation of vector-sensor array in colored noise based on quaternion-MUSIC

Tongxin xuebao, 2008
Parameters of vector-sensor array was estimated based on Hamilton quaternion. First,the theory and computa-tion method of right eigenvalue decomposition of Hamilton quaternion matrix was introduced in detail.
WANG Fei1, WANG Shu-xun2, ZHANG Kun-lei2
doaj   +2 more sources

Eigenvalues of a Hessenberg-Toeplitz matrix

, 2019
Una matriz de Hessenberg Toeplitz es un tipo especial de matriz cuadrada que es “casi” triangular, estás matriz tiene ceros en las entradas sobre la primera superdiagonal, cada diagonal descendente de derecha a izquierda es constante y las entradas son coeficientes de Fourier de una función diferenciable definida en los complejos, esta función es ...
openaire   +2 more sources

Low Complexity DOA Estimation of Multiple Coherent Sources Using a Single Direct Data Snapshot

IEEE Access
The direction of arrival (DOA) estimation of multiple radio frequency (RF) coherent signals using conventional algorithms such as Multiple Signal Classification (MUSIC), Estimation of the Signal Parameters via the Rotational Invariance Technique (ESPRIT),
Ahmed A. Hussain, Nizar Tayem, Abdel-Hamid Soliman   +2 more
doaj   +1 more source

Simple subspace based adaptive beamforming under Toeplitz covariances

EURASIP Journal on Advances in Signal Processing
When uncorrelated signals are incident on a uniform linear array, the array covariance matrix is of the Toeplitz form. An adaptive beamforming method is proposed based on the signal-plus-interference (SI) subspace via the Toeplitz rectification of the ...
Yang-Ho Choi
doaj   +1 more source

Not every matrix is similar to a Toeplitz matrix

Linear Algebra and its Applications, 2001
The inverse eigenvalue problem in matrix calculus is considered. It is known that such a problem is always solvable in a class of Toeplitz matrices and, in particular, of real symmetric Toeplitz matrices [cf. \textit{P. Delsarte} and \textit{Y. Genin}, Lect. Notes Control Inf. Sci. 58, 194-213 (1984; Zbl 0559.15017); \textit{H. J. Landau}, J. Am. Math.
openaire   +1 more source