Discrete 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).
Periodicals related to Discrete Fourier Transform
Back to TopImage 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.
The most highlycited general interest journal in electrical engineering and computer science, the Proceedings is the best way to stay informed on an exemplary range of topics. This journal also holds the distinction of having the longest useful archival life of any EE or computer related journal in the world! Since 1913, the Proceedings of the IEEE has been the ...
Signal Processing Letters, IEEE
Rapid dissemination of new results in signal processing worldwide.
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.
Xplore Articles related to Discrete Fourier Transform
Back to TopThe discrete Fourier transform for computation of symmetrical components harmonics
H. Henao; T. Assaf; G. A. Capolino Power Tech Conference Proceedings, 2003 IEEE Bologna, 2003
The present paper describes a procedure for the online computation of the harmonics of symmetrical components based on the discrete Fourier transform (DFT) that uses all the information contained in the linetoline voltages and line current. The proposed method has been tested experimentally to measure the harmonics of symmetrical components of a working threephase induction motor for a wide interval ...
The method of minimum of duration in application to permittivity profile reconstruction
S. G. Alexin; O. S. Antropov; O. O. Drobakhin 2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory, 2008
A new approach to permittivity profile reconstruction based on impulse reflection response processing is considered. The impulse response data is examined to be obtained with use of microwave reflection coefficient data extrapolation technique completed with discrete Fourier transform. The extrapolation is carried through special functional minimization procedure providing minimum of quasiduration of impulse response (method of minimum of duration, MMD). ...
Analysis of EO polymer mode converter with bottom transverse poling electrodes
ShugJune Hwang; Hsin Her Yu Journal of Lightwave Technology, 2003
The operation of integratedoptics electrooptic (EO) polymer modulators relies on the Pockel effect that is generated by applying an electric field to the optical waveguides. Birefringent behavior occurs because of the dipole realignment of the poled polymer film. In this paper, the staticfield analysis of the electric field distribution for the mode converters with bottom transverse electrodes incorporating a buffer ...
Codebook Design for LTEA Downlink System
Lu Wu; Jinhui Chen; Hongwei Yang; Di Lu Vehicular Technology Conference (VTC Fall), 2011 IEEE, 2011
Multipleinput multipleoutput (MIMO) has been adopted by long term evolution (LTE) and its updated version LTEAdvanced (LTEA) to increase the spectrum efficiency. However, the benefits of multiuser (MU) MIMO highly rely on the accurate channel knowledge at the transmitter. So proper codebook design is a key problem for LTEA FDD downlink system. In this paper, a codebook design with phase ...
Warped discrete Fourier transform: A new concept in digital signal processing
S. Franz; S. K. Mitra; J. C. Schmidt; G. Doblinger Acoustics, Speech, and Signal Processing (ICASSP), 2002 IEEE International Conference on, 2002
The recently introduced concept of warped discrete Fourier transform (WDFT) [2] is reviewed and its main properties are compared with that of their well known DFT counterparts. A number of new applications, such as frequency estimation of noisecorrupted short length sinusoids, discrete multitone transmission, and oversampled nonuniform filter banks, are described. In addition, some important design issues, such as the ...
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Educational Resources on Discrete Fourier Transform
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The discrete Fourier transform for computation of symmetrical components harmonics
H. Henao; T. Assaf; G. A. Capolino Power Tech Conference Proceedings, 2003 IEEE Bologna, 2003
The present paper describes a procedure for the online computation of the harmonics of symmetrical components based on the discrete Fourier transform (DFT) that uses all the information contained in the linetoline voltages and line current. The proposed method has been tested experimentally to measure the harmonics of symmetrical components of a working threephase induction motor for a wide interval ...
The method of minimum of duration in application to permittivity profile reconstruction
S. G. Alexin; O. S. Antropov; O. O. Drobakhin 2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory, 2008
A new approach to permittivity profile reconstruction based on impulse reflection response processing is considered. The impulse response data is examined to be obtained with use of microwave reflection coefficient data extrapolation technique completed with discrete Fourier transform. The extrapolation is carried through special functional minimization procedure providing minimum of quasiduration of impulse response (method of minimum of duration, MMD). ...
Analysis of EO polymer mode converter with bottom transverse poling electrodes
ShugJune Hwang; Hsin Her Yu Journal of Lightwave Technology, 2003
The operation of integratedoptics electrooptic (EO) polymer modulators relies on the Pockel effect that is generated by applying an electric field to the optical waveguides. Birefringent behavior occurs because of the dipole realignment of the poled polymer film. In this paper, the staticfield analysis of the electric field distribution for the mode converters with bottom transverse electrodes incorporating a buffer ...
Codebook Design for LTEA Downlink System
Lu Wu; Jinhui Chen; Hongwei Yang; Di Lu Vehicular Technology Conference (VTC Fall), 2011 IEEE, 2011
Multipleinput multipleoutput (MIMO) has been adopted by long term evolution (LTE) and its updated version LTEAdvanced (LTEA) to increase the spectrum efficiency. However, the benefits of multiuser (MU) MIMO highly rely on the accurate channel knowledge at the transmitter. So proper codebook design is a key problem for LTEA FDD downlink system. In this paper, a codebook design with phase ...
Warped discrete Fourier transform: A new concept in digital signal processing
S. Franz; S. K. Mitra; J. C. Schmidt; G. Doblinger Acoustics, Speech, and Signal Processing (ICASSP), 2002 IEEE International Conference on, 2002
The recently introduced concept of warped discrete Fourier transform (WDFT) [2] is reviewed and its main properties are compared with that of their well known DFT counterparts. A number of new applications, such as frequency estimation of noisecorrupted short length sinusoids, discrete multitone transmission, and oversampled nonuniform filter banks, are described. In addition, some important design issues, such as the ...
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IEEEUSA EBooks

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.

Fourier Representations of Signals
This chapter contains sections titled: The Fourier Series Cosineonly Expansion of Fourier Series Fourier Series in Complex Exponentials The Fourier Transform Physical Meaning of Fourier Transform Properties of the Fourier Transform Fourier Transform Representations for Periodic Signals The Discrete Fourier Transform The Inverse Discrete Fourier Transform Physical Meaning of the Discrete Fourier Transform This chapter contains sections titled: Further Reading Exercises

A Linear Filtering Approach to the Computation of the Discrete Fourier Transform
This chapter contains sections titled: Introduction, An Algorithm Suggested by Chirp Filtering

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.

A Note on Digital Filter Synthesis
It is commonly assumed that digital filters with both poles and zeros in the complex zplane can be synthesized using only recursive techniques while filters with zeros alone can be synthesized by either direct convolution or via the discrete Fourier transform (OFT). In this letter it is shown that no such restrictions hold and that both types of filters (those wth zeros alone or those with both poles and zeros) can be synthesized using any of the three methods, namely, recursion, OFT, or direct convolution.

Chapter 2 discusses digital modulation techniques, including both single carrier modulation and multicarrier modulation. Basic OFDM processing operations, such as discrete Fourier transform (DFT)/inverse discrete Fourier transform (IDFT), guard interval insertion/removal, guard band reservation, spectrum shaping, and peaktoaverage power ratio are all addressed.

Some Probability and Stochastic Convergence Fundamentals
This chapter contains sections titled: Notations and Definitions The Covariance Matrix of a Function of a Random Variable Sample Variables Mixing Random Variables Preliminary Example Definitions of Stochastic Limits Interrelations between Stochastic Limits Properties of Stochastic Limits Laws of Large Numbers Central Limit Theorems Properties of Estimators CramérRao Lower Bound How to Prove Asymptotic Properties of Estimators? Pitfalls Preliminary Example  Continued Properties of the Noise after a Discrete Fourier Transform Exercises Appendixes

SingleTone Parameter Estimation from DiscreteTime Observations
Estimation of the parameters of a singlefrequency complex tone from a finite number of noisy discretetime observations is discussed. The appropriate CramÃ©rRao bounds and maximumlikelihood (ML) estimation algorithms are derived. Some properties of the ML estimators are proved. The relationship of ML estimation to the discrete Fourier transform is exploited to obtain practical algorithms. The threshold effect of one algorithm is analyzed and compared to simulation results. Other simulation results verify other aspects of the analysis.

Fourier Transform and Fourier Series
The Fourier transform (FT) has been widely used in circuit analysis and synthesis, from filter design to signal processing, image reconstruction, and so on. Fourier transform is used for energy signal which contain finite energy. The discrete Fourier transform (DFT) and fast Fourier transform (FFT) are discrete tools to analyze time domain signals. One needs to know the problems caused by discretization and specify the parameters accordingly to avoid nonphysical and nonmathematical results. Mathematically, FT is defined for continuous time signals, and in order to go to frequency domain, the time signal must be observed from an infiniteextend time window. This chapter lists a simple MATLAB code for the Fourier series representation of a given function. The number of terms required in the Fourier series representation depends on the smoothness of the function and the specified accuracy.

Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing
This paper discusses the analysis and simulation of a technique for combating the effects of multipath propagation and cochannel interference on a narrow band digital mobile channel. This system uses the discrete Fourier transform to orthogonally frequency multiplex many narrow subchannels, each signaling at a very low rate, into one highrate channel. When this technique is used with pilotbased correction, the effects of flat Rayleigh fading can be reduced significantly. An improvement in signaltointerference ratio of 6 dB can be obtained over the bursty Rayleigh channel. In addition, with each subchannel signaling at a low rate, this technique can provide added protection against delay spread. To enhance the behavior of the technique in a heavily frequency selective environment, interpolated pilots are used. A frequency offset reference scheme is employed for the pilots to improve protection against cochannel interference.
Standards related to Discrete Fourier Transform
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