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485
Wideband frequencydomain characterization of FR4 and timedomain causality
 IEEE Trans Electromagn Compat
"... Abstract—FR4 is one of the most widely used dielectric substrates in the fabrication of printed circuits for fast digital devices. This material exhibits substantial losses and the loss tangent is practically constant over a wide band of frequencies. This paper presents measured data for the comple ..."
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Cited by 22 (1 self)
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for the complex permittivity of this material from power frequencies up to the microwave region. In addition it gives simple closedform expressions that approximate the measured data and provide a causal response in the time domain. Index Terms—Causality, dielectric losses, dielectric measurements, dispersive
Wideband frequencydomain characterization of FR4 and timedomain causality
 IEEE Trans Electromagn Compat 43 (2001), 662–667. © 2006
"... Abstract FR4 is one of the most widely used dielectric substrates in the fabrication of printed circuits for fast digital devices. This material exhibits substantial losses and the loss tangent is practically constant over a wide band of frequencies. This paper presents measured data for the comp ..."
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Cited by 3 (0 self)
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for the complex permittivity of this material from power frequencies up to the microwave region. In addition it gives simple closedform expressions that approximate the measured data and provide a causal response in the time domain.
Frequency Domain Causality Analysis
"... This study investigates causal dynamics between crude oil prices and exchange rates in Brazil, India and Turkey by employing monthly data from the beginning of floating exchange regime to July 2011. The study benefits from the recent developments in the time series econometric analysis and carries o ..."
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out time domain causality tests (linear causality, nonlinear causality, volatility spillover) and frequency domain causality test. Findings show that results from frequency domain causality test are slightly different from than those from time domain causality methods. The frequency domain analysis
NonCausal TimeDomain Filters for SingleChannel Noise Reduction
"... Abstract—In many existing timedomain filtering methods for noise reduction in, e.g., speech processing, the filters are causal. Such causal filters can be implemented directly in practice. However, it is possible to improve the performance of such noise reduction filtering methods in terms of bot ..."
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Cited by 2 (1 self)
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Abstract—In many existing timedomain filtering methods for noise reduction in, e.g., speech processing, the filters are causal. Such causal filters can be implemented directly in practice. However, it is possible to improve the performance of such noise reduction filtering methods in terms
On the causality problem in timedomain blind source separation and deconvolution algorithms
 in Proc. IEEE ICASSP
, 2005
"... Based on a recently presented generic framework for multichannel blind signal processing for convolutive mixtures we investigate in this paper the problem of incorporating acausal delays which are necessary with certain geometric constellations. Starting from a generic update equation which is appli ..."
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Cited by 7 (6 self)
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is applicable to blind source separation (BSS), multichannel blind deconvolution (MCBD), and multichannel blind partial deconvolution (MCBPD) for dereverberation of speech signals, two formulations of the natural gradient are derived. It is shown that one expression is applicable to mere causal filters whereas
TIMEDOMAIN THEORY OF METAL CAVITY RESONATOR
"... Abstract—This paper presents a thorough study of the timedomain theory of metal cavity resonators. The completeness of the vector modal functions of a perfectly conducting metal cavity is first proved by symmetric operator theory, and analytic solution for the field distribution inside the cavity e ..."
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Cited by 7 (0 self)
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Gordon equation are then solved by the method of retarded Green’s function in order that the causality condition is satisfied. Numerical examples are also presented to demonstrate the timedomain theory. The analysis indicates that the timedomain theory is capable of providing an exact picture for the physical
Efficient timedomain simulation of frequencydependent elements
 IEEE/ ACM International Conference on ComputerAided Design: Digest of Technical Papers
, 1996
"... We describe an efficient algorithm for timedomain simulation of elements described by causal impulse responses. The computational bottleneck in the simulation of such elements is the need to compute convolutions at each time point. Hence, direct approaches for the simulation of such elements requ ..."
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Cited by 8 (1 self)
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We describe an efficient algorithm for timedomain simulation of elements described by causal impulse responses. The computational bottleneck in the simulation of such elements is the need to compute convolutions at each time point. Hence, direct approaches for the simulation of such elements
Timedomain detection of superluminal group velocity for single microwave pulses
 Physical Review E (Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
, 2000
"... Single microwave pulses centered at 9.68 GHz with 100MHz ͑full width at half maximum͒ bandwidth are used to evanescently tunnel through a onedimensional photonic crystal. In a direct timedomain measurement, it is observed that the peak of the tunneling wave packets arrives (440Ϯ20) ps earlier th ..."
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Cited by 15 (8 self)
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Single microwave pulses centered at 9.68 GHz with 100MHz ͑full width at half maximum͒ bandwidth are used to evanescently tunnel through a onedimensional photonic crystal. In a direct timedomain measurement, it is observed that the peak of the tunneling wave packets arrives (440Ϯ20) ps earlier
Physically Admissible Impedance Models for TimeDomain Computations of Outdoor Sound Propagation
"... Conditions for an impedance model to be physically admissible are checked for some popular models in the outdoor sound propagation community. They require that the definition of the impedance model is extended in the whole complex plane and that its inverse Fourier transform is real, causal and pass ..."
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Conditions for an impedance model to be physically admissible are checked for some popular models in the outdoor sound propagation community. They require that the definition of the impedance model is extended in the whole complex plane and that its inverse Fourier transform is real, causal
Landing force controller for a humanoid robot: Timedomain passivity approach
 in Proc. IEEE Int. Conf. Syst
, 2006
"... Abstract—This paper proposes a control method to absorb the landing force or the ground reaction force for a stable dynamic walking of a humanoid robot. Humanoid robot may become unstable during walking due to the impulsive contact force of the sudden landing of its foot. Therefore, a control method ..."
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Cited by 3 (0 self)
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method to decrease the landing force is required. In this paper, timedomain passivity control approach is applied for this purpose. Ground and the foot of the robot are modeled as two oneport network systems that are connected, and exchange energy with each other. The timedomain passivity controller
Results 1  10
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485