'Fft' presentation slideshows

1.DFT ????????????????? 2.1965 ?? Cooley, Tukey? ?????????????? ?

??. 1.DFT ????????????????? 2.1965 ?? Cooley, Tukey? ?????????????? ? 3. ???????? DFT ???????? 1 ? 2 ???? 4. ??????? 2FFT ???. ? 4 ?????. 1. ????????? -2FFT ??????????????????????? 2. ????????? -2FFT ??????????????????????? 3. ?? IFFT ??. ? 4 ? ??????? (FFT). 4.1 ?? 4.2 ? 2FFT ??

1.37k views • 100 slides

Parallel Spectral Methods: Fast Fourier Transform (FFTs) with Applications

1.09k views • 80 slides

??? ?--2?????? FFT ??D ecimation-in-Frequency(DIF) (Sander-Tukey)

??? ?--2?????? FFT ??D ecimation-in-Frequency(DIF) (Sander-Tukey). ??????. ????????N=2 M (M?????????????????X(k)(??M????????????????????????????2??????FFT??????Sander-Tukey???. ?????? 1.??. DFT ???. ?????? X(k) ?k????????????x(n)?n??????????????x(n)?n????????? : ?????x(n),0 ? n?N/2-1 ;

975 views • 80 slides

Chapter 9. Computation of Discrete Fourier Transform

Chapter 9. Computation of Discrete Fourier Transform. 9.1 Introduction 9.2 Decimation-in-Time Factorization 9.3 Decimation-in-Frequency Factorization 9.4 Application of FFT 9.5 Fast Computation of DCT 9.6 Matrix Approach 9.7 Prime Factor Algorithm. BGL/SNU. 1. Introduction. BGL/SNU.

832 views • 44 slides

Efficient FFTs On VIRAM

483 views • 37 slides

2.4 ?? FFT ???????? 1 ? IDFT ?????

2.4 ?? FFT ???????? 1 ? IDFT ????? ?? FFT ????????????????? (Inverse Discrete Fourier Transform ??? IDFT) ??? DFT ? IDFT ??????. ? DIT?IFFT ????. ? DIT?IFFT ???? ( ???? ). ???????? FFT ????? IFFT ?????????? ??. ????????????. 2 ?????? FFT

832 views • 35 slides

Scaling Three-dimensional Fourier Transforms

Scaling Three-dimensional Fourier Transforms. Dmitry Pekurovsky dmitry@sdsc.edu San Diego Supercomputer Center. Fast Fourier Transform (FFT). F(k) = S x f(x) exp(-i2 p kx/N) A well-known, efficient, commonly used algorithm 1D FFT used in MANY science fields

530 views • 29 slides

Parallelization of FFT in AFNI

Parallelization of FFT in AFNI. Huang, Jingshan Xi, Hong Department of Computer Science and Engineering University of South Carolina. Motivation. AFNI: a widely used software package for medical image processing Drawback: not a real-time system

416 views • 27 slides

18-491 Lecture #18 FAST FOURIER TRANSFORM ALTERNATE IMPLEMENTATIONS

18-491 Lecture #18 FAST FOURIER TRANSFORM ALTERNATE IMPLEMENTATIONS. Richard M. Stern. Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh, Pennsylvania 15213 Phone: +1 (412) 268-2535 FAX: +1 (412) 268-3890 rms@cs.cmu.edu http://www.ece.cmu.edu/~rms

974 views • 25 slides

Scaling of a Pseudospectral DNS Turbulence Code and a Parallel 3D FFT Library

Scaling of a Pseudospectral DNS Turbulence Code and a Parallel 3D FFT Library. Dmitry Pekurovsky dmitry@sdsc.edu San Diego Supercomputer Center. Examples of turbulence are common. Disorderly, nonlinear fluctuations in 3D space and time that span a wide range of interacting scales.

493 views • 25 slides

Is F Better than D

313 views • 22 slides

Intel AVX ???????? FFT ??????

Intel AVX ???????? FFT ??????. ???? ???????????. ????. ?? ?? Six-Step FFT ?????? In-Cache FFT ?????? Intel AVX ?? FFT ?????????? ???? ???. ??? 1/2 ?. ?? Fourier ??? FFT ??????????????????????????????? ??????????????????????????????? Short Vector SIMD ???????????????

441 views • 20 slides

An FFT/IFFT Accelerator for OCT Application

An FFT/IFFT Accelerator for OCT Application. Zhenhong Liu. What is OCT?. OCT = Optical Coherence Tomography An optical analogy of Ultrasound Tomography Provide micrometer-resolution Light source is not harmful (unlike x-ray). Optical coherence tomogram of a fingertip

374 views • 19 slides

BPBO #3124

BPBO #3124. X=0.28. S2. S1. DF S1. DF S2. DF S1. DF S1. BF. DF S2. DF S2. DF S1 255Kx. BF 255Kx. DF S2 255Kx. Tilt 2. Tilt 1. Tilt 3. Tilt 4. Tilt 4. Tilt 5. Tilt 5. Including transmitted diffraction spot. IFFT. IFFT. FFT. Without transmitted diffraction spot. IFFT.

345 views • 18 slides

HPEC 2006 Poster Session B.4 20 September 2006 Ray Andraka, P.E.

Hybrid Floating point Technique yields 1.2 Giga-sample per second 32 to 2048 point floating point FFT in a single FPGA. HPEC 2006 Poster Session B.4 20 September 2006 Ray Andraka, P.E. President, Andraka Consulting Group, Inc ray@andraka.com.

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?? FFT ??? RS ??

351 views • 14 slides

Thomas L. Sexton, Ph. D., ABPP Functional Family Therapy Associates

221 views • 11 slides

???????????????

???????????????. 5120309037 ???. ?????. ? 2n ????????????? n-1 ???????? n ???????. ??????? (DFT). ?? ???? IDFT ? ?????. ??????? (FFT). ? ??? ???? ????. ????. Vector Recursive_FFT (Vector x){ if (n == 1) return x; Vector x0, x1; for ( auto i = x.begin (); i!= x.end ();){

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Friends and Family Test (FFT ) Results for February 2015

Friends and Family Test (FFT ) Results for February 2015.

422 views • 5 slides

Friends and Family Test (FFT ) Results for November 2014

Friends and Family Test (FFT ) Results for November 2014.

225 views • 5 slides