Browsing by Keywords "Numerical results"
Now showing items 120 of 20

Adaptive measurement matrix design for compressed DoA estimation with sensor arrays
(IEEE, 2015)In this work we consider the problem of measurement matrix design for compressed 3D Direction of Arrival (DoA) estimation using a sensor array with analog combiner. Since generic measurement matrix designs often do not ... 
Algebraic acceleration and regularization of the source reconstruction method with the recompressed adaptive cross approximation
(IEEE, 2014)We present a compression algorithm to accelerate the solution of source reconstruction problems that are formulated with integral equations and defined on arbitrary threedimensional surfaces. This compression technique ... 
Analysis of doublenegative materials with surface integral equations and the multilevel fast multipole algorithm
(IEEE, 2011)We present a fast and accurate analysis of doublenegative materials (DNMs) with surface integral equations and the multilevel fast multipole algorithm (MLFMA). DNMs are commonly used as simplified models of metamaterials ... 
Analytical model of asynchronous sharedperwavelength multifiber optical switch
(IEEE, 2011)In this paper, a bufferless sharedperwavelength optical switch is equipped with multifiber interfaces and operated in asynchronous context. An analytical model to evaluate loss performance is proposed using an approximate ... 
Asymmetric chiral metamaterial circular polarizer based on four Ushaped split ring resonators
(Optical Society of America, 20110428)An asymmetric chiral metamaterial structure is constructed by using four doublelayered Ushaped split ring resonators, which are each rotated by 90° with respect to their neighbors. The peculiarity of the suggested design ... 
An asynchronous twoway relay system with full delay diversity in timevarying multipath environments
(IEEE, 201502)We consider design of asynchronous OFDMbased diamond twowayrelay (DTWR) systems in timevarying frequencyselective (doublyselective) fading channels such as underwater acoustic (UWA) channels. In a DTWR channel, two ... 
Chiral metamaterials with negative refractive index based on four "U" split ring resonators
(American Institute of Physics, 20100823)A uniaxial chiral metamaterial is constructed by doublelayered four "U" split ring resonators mutually twisted by 90°. It shows a giant optical activity and circular dichroism. The retrieval results reveal that a negative ... 
Code design for binary energy harvesting channel
(IEEE, 2017)We consider a binary energy harvesting communication system with a finite battery transmitter over a noisy channel, and design explicit and implementable codes based on concatenation of a nonlinear trellis code (NLTC) with ... 
The design of a wideband and widebeam piston transducer in a finite closed circular baffle
(20080607)The design of a high power piezoelectric underwater transducer operating at frequency range 40 kHz80 kHz with acoustic power capability in excess of 250W is described. The transducer consists of two backtoback elements. ... 
Economic design of EWMA control charts based on loss function
(Elsevier, 2009)For monitoring the stability of a process, various control charts based on exponentially weighted moving average (EWMA) statistics have been proposed in the literature. We study the economic design of EWMAbased mean and ... 
Effect of the offfocus shift of the feed on the radiation characteristics of a 2D parabolic reflector antenna
(IEEE, 2010)The parabolic reflector antennas are widely used in the telecommunication systems and generally have large aperture sizes like 50λ to 80λ and larger. Their reliable fullwave analysis with the conventional Method of Moments ... 
Effects of signal randomization on performance of binary communications systems
(IEEE, 2010)In this paper, effects of signal randomization are studied for binary communications systems. First, it is stated that the average probability of error for a powerconstrained binary communications system is minimized when ... 
Efficient analysis of large finite arrays via mom formulation with dft based acceleration algorithms
(2003)A DFT based acceleration algorithm is combined with iterative methods to accelerate the computation of Method of Moments (MoM) analysis of electromagnetic radiation/scattering from large, finite freestanding and printed ... 
Electromagnetic imaging of threedimensional dielectric objects with Newton minimization
(IEEE, 2014)We present a general framework for detecting the shape and electrical properties of unknown objects by using the Newton minimization approach for solving inversescattering problems. This procedure is performed by evolving ... 
Energy equipartition and frequency distribution in complex attachments
(Acoustical Society of America, 2009)As reported in several recent publications, an undamped simple oscillator with a complex attachment that consists of a set of undamped parallel resonators can exhibit unusual energy sharing properties. The conservative set ... 
A new method for the prognosis of scan blindness angle in finite phased arrays of printed dipoles
(IEEE, 2011)Scan blindness phenomenon is studied for finite phased arrays of printed dipoles on grounded planar dielectric slabs. A new method for predicting the scan blindness angles using the average scan impedances of a subsection ... 
Spin filtering in a quantum ring with Rashba coupling
(IEEE, 2010)We study the effect of Rashba spinorbit coupling on the spin interference in a noninteracting onedimensional ring connected to two lead theoretically within the nonequilibrium Greens' function formalism. We compute the ... 
A tabu search algorithm for sparse placement of wavelength converters in optical networks
(Springer, 2004)In this paper, we study the problem of placing limited number of wavelength converting nodes in a multifiber network with static traffic demands and propose a tabu search based heuristic algorithm. The objective of the ... 
Tightbinding mechanism in slow light regime
(IEEE, 2011)In this study, tightbinding formalism is applied to a photonic crystal coupled cavity structure in order to investigate the characteristics of ultra slow light modes. Eigenmode splitting is observed and resulting group ... 
Transmission enhancement through deep subwavelength apertures using connected split ring resonators
(Optical Society of American (OSA), 2010)We report astonishingly high transmission enhancement factors through a subwavelength aperture at microwave frequencies by placing connected split ring resonators in the vicinity of the aperture. We carried out numerical ...