Browsing by Keywords "Linear systems"
Now showing items 120 of 31

Calculation of the scalar diffraction field from curved surfaces by decomposing the threedimensional field into a sum of Gaussian beams
(Optical Society of America, 2013)We present a local Gaussian beam decomposition method for calculating the scalar diffraction field due to a twodimensional field specified on a curved surface. We write the threedimensional field as a sum of Gaussian beams ... 
Capacity bounds for an ultrawideband channel model
(2004)There is an ongoing effort by the IEEE 802.15.3a subcommittee to reach a UWB personal area network standard. We estimate the achievable rates for such networks using a channel model specified by the same group. The analysis ... 
Compressive sampling and adaptive multipath estimation
(2010)In many signal processing problems such as channel estimation and equalization, the problem reduces to a linear system of equations. In this proceeding we formulate and investigate linear equations systems with sparse ... 
Computing moments of first passage times to a subset of states in Markov chains
(SIAM, 2005)This paper presents a relatively efficient and accurate method to compute the moments of first passage times to a subset of states in finite ergodic Markov chains. With the proposed method, the moment computation problem ... 
A confidence ellipsoid approach for measurement cost minimization under Gaussian noise
(2012)The wellknown problem of estimating an unknown deterministic parameter vector over a linear system subject to additive Gaussian noise is studied from the perspective of minimizing total sensor measurement cost under a ... 
Continuous and discrete fractional fourier domain decomposition
(IEEE (Institute of Electrical and Electronics Engineers), 2000)We introduce the fractional Fourier domain decomposition for continuous and discrete signals and systems. A procedure called pruning, analogous to truncation of the singularvalue decomposition, underlies a number of ... 
Costefficient approximation of linear systems with repeated and multichannel filtering configurations
(IEEE, Piscataway, NJ, United States, 1998)It is possible to obtain either exact realizations or useful approximations of linear systems or matrixvector products arising in many different applications, by synthesizing them in the form of repeated or multichannel ... 
Electromagnetic modeling of splitring resonators
(2007)In this paper, we report our efforts to model splitring resonators (SRRs) and their large arrays accurately and efficiently in a sophisticated simulation environment based on recent advances in the computational electromagnetics. ... 
The fractional Fourier domain decomposition
(Elsevier, 1999)We introduce the fractional Fourier domain decomposition. A procedure called pruning, analogous to truncation of the singularvalue decomposition, underlies a number of potential applications, among which we discuss fast ... 
Incomplete LU preconditioning for the electricfield integral equation
(2006)Linear systems resulting from the electricfield integral equation (EFIE) become illconditioned, particularly for largescale problems. Hence, effective preconditioners should be used to obtain the iterative solution with ... 
Inverse optimal control and positive real systems
(Bilkent University, 1997)In this thesis an inverse optimal control problem for constant output feedbacks is investigated. Necessary and sufficient conditions for optimality of an output feedback are derived for singleinput, singleoutput systems. ... 
Measurement strategies for input estimation in linear systems
(2007)In this work, we present a mathematical approach for some of the measurement problems arising in optics, which is also applicable to other contexts. We see the measurement problem as the problem of determining the best ... 
Model based anticontrol of discretetiime systems
(Institute of Electrical and Electronics Engineers, 2003)We will consider a modelbased approach for the anticontrol of some discretetime systems. We first assume the existence of a chaotic model in an appropriate form. Then by using an appropriate control input we try to match ... 
Nonlinear laser lithography for indefinitely largearea nanostructuring with femtosecond pulses
(Nature publishing group, 2013)Dynamical systems based on the interplay of nonlinear feedback mechanisms are ubiquitous in nature. Wellunderstood examples from photonics include mode locking and a broad class of fractal optics, including selfsimilarity. ... 
A novel technique for a linear system of equations applied to channel equalization
(2009)In many inverse problems of signal processing the problem reduces to a linear system of equations. Accurate and robust estimation of the solution with errors in both measurement vector and coefficient matrix is a challenging ... 
On Switching H ∞ Controllers for a Class of LPV Systems
(Institute of Electrical and Electronics Engineers, 2003)We consider switching H ∞ controllers for a class of LPV systems scheduled along a measurable parameter trajectory. The candidate controllers are selected from a given controller set according to the switching rules based ... 
On the discrete adaptive posicast controller
(IFAC Secretariat, 2015)In this paper, we present the discrete version of the Adaptive Posicast Controller (APC) that deals with parametric uncertainties in systems with input timedelays. The continuoustime APC is based on the Smith Predictor ... 
On the Set of All Stabilizing FirstOrder Controllers
(2003)A computational method is given for determining the set of all stabilizing proper firstorder controllers for finite dimensional, linear, time invariant, scalar plants. The method is based on a generalized HermiteBie ... 
Parallel minimum norm solution of sparse block diagonal column overlapped underdetermined systems
(Association for Computing Machinery, 2017)Underdetermined systems of equations in which the minimum norm solution needs to be computed arise in many applications, such as geophysics, signal processing, and biomedical engineering. In this article, we introduce a ... 
Parallel preconditioners for solutions of dense linear systems with tens of millions of unknowns
(2007)We propose novel parallel preconditioning schemes for the iterative solution of integral equation methods. In particular, we try to improve convergence rate of the illconditioned linear systems formulated by the electricfield ...