Browsing by Keywords "Frequency domain analysis"
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Analysis of errors in zerofreeparameter modeling approach to predict the voltage of electrochemical energy storage systems under arbitrary load
(Electrochemical Society Inc., 2017)In a recently published article (J. Electrochem. Soc. 164 (2017) A1274A1280), we described a new method to predict the voltage response of electrochemical energy storage systems during arbitrary load profiles. Our work ... 
Application of fractional fourier transform to finite difference time domain method
(2010)With the improvement in the computer speed and memory, Numerical Methods are frequently used in the solution of electromagnetic problems. Numerical Methods can be classified as the frequency domain and the time domain based ... 
Circuit theoretical method for efficient finite element analysis of acoustical problems
(IEEE, 1998)In the last decade, there has been an outstanding improvement in the computer aided design tools for VLSI circuits regarding solution times and the circuit complexity. This study proposes formulating the acoustic field ... 
Coupled deconvolution for frequency extrapolation of electromagnetic solutions with matrix pencil method
(IEEE, 2005)Matrix pencil method (MPM) has been widely used to estimate the parameters of complexexponential based models. An important application is the extrapolation of the frequencydomain solutions of electromagnetic problems. ... 
Coupled matrix pencil method for frequency extrapolation of electromagnetic solutions
(IEEE, 2005)Matrix pencil method (MPM) is used to extrapolate the available electromagnetic solutions in frequency domain to estimate the highfrequency solutions. A new approach, namely, coupled MPM, is introduced to obtain the ... 
An efficient algorithm to extract components of a composite signal
(IEEE, 2000)An efficient algorithm is proposed to extract components of a composite signal. The proposed approach has two stages of processing in which the timefrequency supports of the individual signal components are identified and ... 
Equiripple FIR filter design by the FFT algorithm
(Institute of Electrical and Electronics Engineers, 199703)The fast Fourier transform (FFT) algorithm has been used in a variety of applications in signal and image processing. In this article, a simple procedure for designing finiteextent impulse response (FIR) discretetime ... 
Extraction of primary and secondary frequency control from active power generation data of power plants
(Elsevier Ltd, 2015)Frequency control is a vital component of a secure and robust power grid and it ought to be closely monitored. Frequency control consists of two main components; primary and secondary control and their contributions are ... 
Fast computation of the ambiguity function and the Wigner distribution on arbitrary line segments
(IEEE, 2001)By using the fractional Fourier transformation of the timedomain signals, closedform expressions for the projections of their auto or cross ambiguity functions are derived. Based on a similar formulation for the projections ... 
FEM Based design and simulation tool for MRI birdcage coils Including eigenfrequency analysis
(2012)Radio Frequency (RF) birdcage coils are widely used in Magnetic Resonance Imaging (MRI). Before the actual construction of the coil, not only calculating the capacitance value, which is necessary for the coil to resonate ... 
Filtering in fractional Fourier domains and their relation to chirp transforms
(IEEE, 1994)Fractional Fourier transforms, which are related to chirp and wavelet transforms, lead to the notion of fractional Fourier domains. The concept of filtering of signals in fractional domains is developed, revealing that ... 
The fractional fourier transform and its applications to image representation and beamforming
(2003)The ath order fractional Fourier transform operator is the ath power of the ordinary Fourier transform operator. We provide a brief introduction to the fractional Fourier transform, discuss some of its more important ... 
Generalized timebandwidth product optimal shorttime fourier transformation
(2002)By extending the timebandwidth product concept to fractional Fourier domains, a generalized timebandwidth product (GTBP) is introduced. The GTBP provides a rotation independent measure for the support of the signals in ... 
Generating timevarying road network data using sparse trajectories
(IEEE, 201612)While research on timevarying graphs has attracted recent attention, the research community has limited or no access to real datasets to develop effective algorithms and systems. Using noisy and sparse GPS traces from ... 
High resolution timefrequency analysis by fractional domain warping
(2001)A new algorithm is proposed to obtain very high resolution timefrequency analysis of signal components with curved timefrequency supports. The proposed algorithm is based on fractional Fourier domain warping concept ... 
Independent estimation of input and measurement delays for a hybrid vertical springmassdamper via harmonic transfer functions
(IFAC Secretariat, 2015)System identification of rhythmic locomotor systems is challenging due to the timevarying nature of their dynamics. Even though important aspects of these systems can be captured via explicit mechanicsbased models, it ... 
A multiresolution nonrectangular wavelet representation for twodimensional signals
(Elsevier, 1993)In this paper, a new multiresolution wavelet representation for twodimensional signals is described. This wavelet representation is based on a nonrectangular decomposition of the frequency domain. The decomposition can ... 
A new approach to timefrequency localized signal design
(IEEE, 2002)A novel approach is presented for the design of signals in Wigner Domain. In this method, the desired signal features in the timefrequency domain are specified in two stages. First the user specifies the spine curve around ... 
A new method for the steadystate analysis of periodically excited nonlinear circuits
(Institute of Electrical and Electronics Engineers, 199612)We propose a new method for the steady state analysis of periodically excited nonlinear microwave circuits. It is a modified and more efficient form of NewtonRaphson iteration based harmonic balance (HB) technique. It ... 
A novel STFT implementation for the analysis of nonstationary jammer interference
(2004)A novel adaptive shorttime Fourier transform (STFT) implementation for the analysis of nonstationary multicomponent jammer signals is introduced. The proposed timefrequency distribution is the fusion of optimum STFTs ...