Fourier Transform
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Back to Top2012 International Conference on Digital Image Computing: Techniques and Applications (DICTA)
he International Conference on Digital Image Computing: Techniques and Applications (DICTA) is the main Australian Conference on computer vision, image processing, pattern recognition, and related areas. DICTA was established as a biannual conference in 1991 and became an annual event in 2007. It is the premiere conference of the Australian Pattern Recognition Society (APRS).
2009 IEEE International Conference on Electro/Information Technology (eit2009)
The 2009 Electro/Information Technology Conference, sponsored by the IEEE Region 4 (R4), is focused on basic/applied research results in the fields of electrical and computer engineering as they relate to Information Technology and its applications. The purpose of the conference is to provide a forum for researchers and industrial investigators to exchange ideas and discuss developments in this growing field.
2006 International Conference on Machine Learning and Cybernetics (ICMLC)
Periodicals related to Fourier Transform
Back to TopGeoscience and Remote Sensing, IEEE Transactions on
Theory, concepts, and techniques of science and engineering as applied to sensing the earth, oceans, atmosphere, and space; and the processing, interpretation, and dissemination of this information.
Image Processing, IEEE Transactions on
Signalprocessing aspects of image processing, imaging systems, and image scanning, display, and printing. Includes theory, algorithms, and architectures for image coding, filtering, enhancement, restoration, segmentation, and motion estimation; image formation in tomography, radar, sonar, geophysics, astronomy, microscopy, and crystallography; image scanning, digital halftoning and display, andcolor reproduction.
Medical Imaging, IEEE Transactions on
Imaging methods applied to living organisms with emphasis on innovative approaches that use emerging technologies supported by rigorous physical and mathematical analysis and quantitative evaluation of performance.
Signal Processing, IEEE Transactions on
The technology of transmission, recording, reproduction, processing, and measurement of speech; other audiofrequency waves and other signals by digital, electronic, electrical, acoustic, mechanical, and optical means; the components and systems to accomplish these and related aims; and the environmental, psychological, and physiological factors of thesetechnologies.
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Back to TopGeneralized twiddle factor index mapping of radix2 fast Fourier transform algorithm
Imran Ali Qureshi; Fahad Qureshi 2014 IEEE 5th International Conference on Software Engineering and Service Science, 2014
In pipelined implementation of the fast Fourier transform (FFT), memory is required to store the precomputed twiddle factor in memory. Twiddle factor indexmapping is used for address generation to access the memory. In this work we consider generalized radix2 FFT architecture, proposed the generalized twiddle factor index mapping algorithm for twiddle factor memory and also calculate number of all possible ...
Eiichi Matsubara; Taro Sekikawa; Mikio Yamashita 2008 Conference on Lasers and ElectroOptics and 2008 Conference on Quantum Electronics and Laser Science, 2008
We demonstrate Fourier synthesis of multiple coherent antiStokes Raman scattering signals in a single crystal of LiNbO3 at room temperature. Isolated pulses with 25fs duration and 640780nm wavelength range are generated without any active chirp compensator.
Good Surface Passivation of CSI by High Rate Plasma Deposited Silicon Oxide
B. Hoex; F. J. J. Peeters; M. Creatore; M. D. Bijker; W. M. M. Kessels; M. c. m. Van De Sanden 2006 IEEE 4th World Conference on Photovoltaic Energy Conference, 2006
Silicon dioxide films were deposited by the (industrially applied) expanding thermal plasma technique using a gas mixture of argonoxygen octamethylcyclotetrasiloxane (OMCTS) and at deposition rates in the range of 523 nm/s. The films composition was investigated by means of spectroscopic ellipsometry, Fourier transform infrared spectroscopy and Rutherford backscattering. The composition was close to that of thermal oxide, with only a ...
Twave alternans quantification: which information from different methods?
L. Burattini; S. Bini; R. Burattini 2010 Computing in Cardiology, 2010
Twave alternans, qualitatively defined as everyotherbeat alternations of the Twave morphology, has no standardized quantitative definition yet. Differences in quantitative information provided by the fastFouriertransform spectral method (FFTSM), the modifiedmovingaverage method (MMAM), and our heartrate adaptive match filter method (AMFM) were analyzed here making use of two synthetic ECG tracings with stationary TWA: triangular the first (TRI_TWA), with Twaves maximumamplitude ...
Fault diagnoses for all the stages of the power electronic converter
Tamer Kamel; Yevgen Biletskiy; Christopher P Diduh; Liuchen Chang 2012 25th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), 2012
This paper presents a fault detection, classification, and diagnoses for all the successive stages of the power electronic converter, including; the three phase rectifier, the dcdc converter, and finally the single phase inverter. The paper provides a number of proposed algorithms for the open circuit fault diagnoses of these stages. The inputs of these algorithms are the voltage and current ...
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Generalized twiddle factor index mapping of radix2 fast Fourier transform algorithm
Imran Ali Qureshi; Fahad Qureshi 2014 IEEE 5th International Conference on Software Engineering and Service Science, 2014
In pipelined implementation of the fast Fourier transform (FFT), memory is required to store the precomputed twiddle factor in memory. Twiddle factor indexmapping is used for address generation to access the memory. In this work we consider generalized radix2 FFT architecture, proposed the generalized twiddle factor index mapping algorithm for twiddle factor memory and also calculate number of all possible ...
Eiichi Matsubara; Taro Sekikawa; Mikio Yamashita 2008 Conference on Lasers and ElectroOptics and 2008 Conference on Quantum Electronics and Laser Science, 2008
We demonstrate Fourier synthesis of multiple coherent antiStokes Raman scattering signals in a single crystal of LiNbO3 at room temperature. Isolated pulses with 25fs duration and 640780nm wavelength range are generated without any active chirp compensator.
Good Surface Passivation of CSI by High Rate Plasma Deposited Silicon Oxide
B. Hoex; F. J. J. Peeters; M. Creatore; M. D. Bijker; W. M. M. Kessels; M. c. m. Van De Sanden 2006 IEEE 4th World Conference on Photovoltaic Energy Conference, 2006
Silicon dioxide films were deposited by the (industrially applied) expanding thermal plasma technique using a gas mixture of argonoxygen octamethylcyclotetrasiloxane (OMCTS) and at deposition rates in the range of 523 nm/s. The films composition was investigated by means of spectroscopic ellipsometry, Fourier transform infrared spectroscopy and Rutherford backscattering. The composition was close to that of thermal oxide, with only a ...
Twave alternans quantification: which information from different methods?
L. Burattini; S. Bini; R. Burattini 2010 Computing in Cardiology, 2010
Twave alternans, qualitatively defined as everyotherbeat alternations of the Twave morphology, has no standardized quantitative definition yet. Differences in quantitative information provided by the fastFouriertransform spectral method (FFTSM), the modifiedmovingaverage method (MMAM), and our heartrate adaptive match filter method (AMFM) were analyzed here making use of two synthetic ECG tracings with stationary TWA: triangular the first (TRI_TWA), with Twaves maximumamplitude ...
Fault diagnoses for all the stages of the power electronic converter
Tamer Kamel; Yevgen Biletskiy; Christopher P Diduh; Liuchen Chang 2012 25th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), 2012
This paper presents a fault detection, classification, and diagnoses for all the successive stages of the power electronic converter, including; the three phase rectifier, the dcdc converter, and finally the single phase inverter. The paper provides a number of proposed algorithms for the open circuit fault diagnoses of these stages. The inputs of these algorithms are the voltage and current ...
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Pragmatic Circuits: Signals and Filters is built around the processing of signals. Topics include spectra, a short introduction to the Fourier series, design of filters, and the properties of the Fourier transform. The focus is on signals rather than power. But the treatment is still pragmatic. For example, the author accepts the work of Butterworth and uses his results to design filters in a fairly methodical fashion. This third of three volumes finishes with a look at spectra by showing how to get a spectrum even if a signal is not periodic. The Fourier transform provides a way of dealing with such nonperiodic signals. The two other volumes in the Pragmatic Circuits series include titles on DC and Time Domain and Frequency Domain. These short lecture books will be of use to students at any level of electrical engineering and for practicing engineers, or scientists, in any field looking for a practical and applied introduction to circuits and signals. The author's "pragmati " and applied style gives a unique and helpful "nonidealistic, practical, opinionated" introduction to circuits

Fourier Analysis on NonAbelian Groups
The prelims comprise: Representations of Groups Fourier Transform on Finite Groups Properties of the Fourier transform Matrix interpretation of the Fourier transform on finite nonAbelian groups Fast Fourier transform on finite nonAbelian groups References

An algorithm is presented for the calculation of the spectrum of direct digital frequency synthesizers (DDFS'B) as a result of phase accumulator truncation. This algorithm. which is derived using number theoretic methods. includes a dosed form expression, relating the magnitude, number, and position of the spurious noise lines in the output spectrum at a DDFS to the readonly memory (ROM) lookup table size, the amount of phase accumulator truncation and the input frequency control command. The combined finite word length effects of the ROM and the DigitaltoAnalog converter (DAC) nonlinearities are also examined in the light of these new results and new design guidelines are developed. The spectrums predicted by these closed form expressions are compared against spectrums generated by a discrete Fourier transform (DFT) and are shown to have comparable accuracy. As a result of obtaining an expression for the magnitude of the spurious noise frequencies, a relationship between the greatest common divisor at the input frequency command word and the ROM table size, the phase accumulator word lengths, and the magnitude of the worst case sput is obtained. This relationship is used as the basis for a novel modification to the conventional phase accumulator structure which results in a 3.922dB reduction in the magnitude of the worst ease spurious response. This hardware modification is also shown to average out the error effects of DAC nonlinearities and roundoff in the stored sine ROM samples.

Matrix Interpretation of the Fast Fourier Transform
The prelims comprise: Matrix interpretation of FFT on finite nonAbelian groups Illustrative examples Complexity of the FFT FFT through decision diagrams References

Measurements of Frequency Response Functions
This chapter contains sections titled: Introduction An Introduction to the Discrete Fourier Transform Spectral Representations of Periodic Signals Analysis of FRF Measurements Using Periodic Excitations Reducing FRF Measurement Errors for Periodic Excitations FRF Measurements Using Random Excitations FRF Measurements of Multiple Input, Multiple Output Systems Guidelines for FRF Measurements Conclusion Exercises Appendixes

You can immediately have the power to perform electromagnetic simulation. If you have a fundamental understanding of electromagnetic theory and the knowledge of at least one highlevel computer language, you can begin writing simple electromagnetic simulation programs after reading the first chapter of this book. Electromagnetic Simulation Using the FDTD Method describes the power and flexibility of the finitedifference timedomain method as a direct simulation of Maxwell's equations. The FDTD method takes advantage of today's advanced computing power because its computational requirements increase linearly with the size of the simulation problem. This book begins with a simple onedimensional simulation and progresses to a threedimensional simulation. Each chapter contains a concise explanation of an essential concept and instruction on its implementation into computer code. Projects that increase in complexity are included, ranging from simulations in free space to propagation in dispersive media. Peripheral topics that are pertinent to timedomain simulation, such as Ztransforms and the discrete Fourier transform, are also covered. Electromagnetic Simulation Using the FDTD Method is written for anyone who would like to learn electromagnetic simulation using the finitedifference timedomain method. Appropriate as both a textbook and for selfstudy, this tutorialstyle book will provide all the background you will need to begin research or other practical work in electromagnetic simulation.

This book focuses on a class of singlechannel noise reduction methods that are performed in the frequency domain via the shorttime Fourier transform (STFT). The simplicity and relative effectiveness of this class of approaches make them the dominant choice in practical systems. Even though many popular algorithms have been proposed through more than four decades of continuous research, there are a number of critical areas where our understanding and capabilities still remain quite rudimentary, especially with respect to the relationship between noise reduction and speech distortion. All existing frequencydomain algorithms, no matter how they are developed, have one feature in common: the solution is eventually expressed as a gain function applied to the STFT of the noisy signal only in the current frame. As a result, the narrowband signaltonoise ratio (SNR) cannot be improved, and any gains achieved in noise reduction on the fullband basis come with a price to pay, which is speec distortion. In this book, we present a new perspective on the problem by exploiting the difference between speech and typical noise in circularity and interframe selfcorrelation, which were ignored in the past. By gathering the STFT of the microphone signal of the current frame, its complex conjugate, and the STFTs in the previous frames, we construct several new, multipleobservation signal models similar to a microphone array system: there are multiple noisy speech observations, and their speech components are correlated but not completely coherent while their noise components are presumably uncorrelated. Therefore, the multichannel Wiener filter and the minimum variance distortionless response (MVDR) filter that were usually associated with microphone arrays will be developed for singlechannel noise reduction in this book. This might instigate a paradigm shift geared toward speech distortionless noise reduction techniques.

An Introduction to Modulations and Waveforms for 5G Networks
This chapter reviews some of the best recently proposed alternatives to orthogonal frequency division multiplexing (OFDM). It gives mathematical models and blockschemes of the transmitter for all the alternatives considered. The chapter provides a comparative analysis of these modulations, highlights their pros and cons, and discusses their ability to operate in the 5G reference scenarios. It devotes to all major alternative modulation formats beyond OFDM, including filterbank multicarrier (FBMC), generalized frequency division multiplexing (GFDM), biorthogonal frequency division multiplexing (BFDM), universal filtered multicarrier (UFMC) and timefrequency packing (TFP). The chapter deals with the waveform choice issue by providing some shaping pulses that can be considered as alternatives to the rectangular pulse adopted in OFDM. The design of discretetime windows with the discussed properties is a classical topic that arises in many areas of signal processing, such as fast Fourier transform (FFT)based spectrum analysis and the synthesis of finiteimpulseresponse filters with the window method.

Synchronized Phasor Measurement
Phasor computation is a digital technology of estimating the phasor components from the measured analog waveforms. Devices to perform such digital signal processing are called phasor measurement units (PMUs). This chapter provides a description of methods in computing the phasor quantities, in particular, at off???nominal frequencies. The basic method used to compute the phasor representation of a sinusoidal signal is the discrete Fourier transform (DFT). Under off???nominal frequency operation, the phasor expression requires a post???processing step to correct for the effects caused by the leakage phenomenon, resulting from the truncation of sampled data outside the data window. The chapter then discusses a few applications of PMU data to monitor the impact of disturbances on a power system and extract power system disturbance information. PMU data is also useful for reinforcing some of the power system dynamics concepts.

Fourier Transforms of Analog Signals
This chapter furnishes a detailed introduction to the theory and application of the Fourier transform  the first of several transforms we shall encounter in this book. We cover the two analog transforms: the Fourier series, for periodic signals, and the Fourier transform proper, for aperiodic signals.
Standards related to Fourier Transform
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