Performance enhancement of signal acquisition and signal tracking for GNSS software receivers, utilizing novel signal processing and algorithm methods like compressive sensing and Kalman filter [PDF]
, 2021 A significant challenge in global navigation satellite system (GNSS) signal processing is a requirement for a very high sampling rate. The recently-emerging compressed sensing (CS) theory makes processing GNSS signals at a low sampling rate possible if ...
Bermudez Ordoñez, Juan Carlos
core +1 more source
On the essential commutant of analytic Toeplitz operators associated with spherical isometries [PDF]
, 2011 Let T∈B(H)n be an essentially normal spherical isometry with empty point spectrum on a separable complex Hilbert space H, and let AT⊂B(H) be the unital dual operator algebra generated by T. In this note we show that every operator S∈B(H) in the essential
Eschmeier, Jörg +5 more
core +1 more source
Dual Piecewise Analytic Bundle Shift Models of Linear Operators [PDF]
, 1996 LetTbe a Banach space operator with empty point spectrum, whose essential spectrum lies on a finite system of (possibly intersecting) curves. Under certain conditions onT, dual analytic representations ofTas a kind of bundle shift and of T* as an ...
Yakubovich, D.V.
core +1 more source
Toeplitz operators on finite and infinite dimensional spaces with associated psi *-Fréchet algebras [PDF]
, 2006 The present thesis is a contribution to the multi-variable theory of Bergman and Hardy Toeplitz operators on spaces of holomorphic functions over finite and infinite dimensional domains.
Bauer, Wolfram
core +1 more source
Operators on the orthogonal complement of the Dirichlet space [PDF]
, 2009 In this paper we prove that a dual Hankel operator is zero if and only if its symbol is orthogonal to the Dirichlet space in the Sobolev space, and characterize the symbols for (semi-)commuting dual Toeplitz operators on the orthogonal complement of the ...
Yu, Tao
core +1 more source
On the reflexivity of subspaces of Toeplitz operators on the Hardy space on the upper half-plane [PDF]
, 2013 summary:The reflexivity and transitivity of subspaces of Toeplitz operators on the Hardy space on the upper half-plane are investigated. The dichotomic behavior (transitive or reflexive) of these subspaces is shown.
Ptak, Marek, Młocek, Wojciech
core +1 more source
Inner functions and spherical isometries [PDF]
, 2011 A commuting tuple T = ( T 1 , … , T n ) ∈ B ( H ) n T =(T_1, \ldots , T_n) \in ...
Michael Didas, Jörg Eschmeier
core +1 more source
Quasinormality and Numerical Ranges of Certain Classes of Dual Toeplitz Operators [PDF]
Abstract and Applied Analysis, 2010 The study of dual Toeplitz operators was elaborated by Stroethoff and Zheng (2002), where various corresponding algebraic and spectral properties were established. In this paper, we characterize numerical ranges of certain classes of dual Toeplitz operators.
openaire +4 more sources
A Quantised Push‐Sum Distributed Adaptive Momentum Algorithm for Optimisation Over Directed Networks
CAAI Transactions on Intelligence Technology, EarlyView.ABSTRACT In this paper, we investigate a distributed constrained optimisation problem over directed networks. The agents in the networks conduct local computations and communications, endeavouring to collaboratively minimise the aggregation of all locally known convex cost functions subject to a global constraint set.
Qingguo Lü +6 more
wiley +1 more source
Filomat, 2022 In this paper, we characterize the hyponormal dual Toeplitz operators with special symbols on the orthogonal complement of the pluriharmonic Bergman space of the unit ball. Also we completely characterize the pluriharmonic symbols for (semi)commuting dual Toeplitz operators.
Yinyin Hu, Yufeng Lu, Yixin Yang
openaire +1 more source