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![Fast Fourier transform - Wikipedia, the free encyclopedia]()
en.wikipedia.orgA fast Fourier transform (FFT) is an algorithm to compute the discrete Fourier transform (DFT) and its inverse. Fourier analysis converts time (or space) to frequency and vice versa; an FFT rapidly computes such transformations by factorizing the DFT matr瀏覽：1168 -
![Mathematics 5342 Discrete Fourier Transform]()
texas.math.ttu.eduLets consider an example taken from [3]. Let f(t)= ‰ 12exp(¡3t);t‚0 0;t3 and let T=3. Do the following in Matlab N=128; t=linspace(0,3,N); f=12*exp(-3*t);瀏覽：842
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日期：2025-11-22
Direct application of the definition of the DFT (see Discrete Fourier Transform (
DFT)) to a data vector of length n requires n multiplications and n additions—a ......
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日期：2025-11-23
Fourier transforms, convolution, digital filtering. ... run-time algorithm tuning
control. ifft, Inverse fast Fourier transform. ifft2, 2-D inverse fast Fourier transform....
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日期：2025-11-19
The fundamental tool of signal processing is the FFT, or fast Finite Fourier
Transform. To take the FFT of the sunspot data type the following. The first
component ......
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日期：2025-11-19
12 Aug 2012 ... Your data will be a Nx2 matrix in MATLAB with the first column the time data and
the second column the data you want to Fourier transform....
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日期：2025-11-19
9 Dec 2010 ... The Discrete Fourier Transform (DFT) transforms discrete data from the sample
domain to the frequency domain. The Fast Fourier Transform ......
瀏覽：1048
日期：2025-11-20
Direct application of the definition of the DFT (see Discrete Fourier Transform (
DFT)) to a data vector of length n requires n multiplications and n additions—a ......
瀏覽：895
日期：2025-11-17
24 Nov 2011 ... I have 100 data taken from 0 to 346.5 microseconds. the time interval for each
data is 3.5 microseconds. I need to plot the FFT of this data....
瀏覽：854
日期：2025-11-20
Direct application of the definition of the DFT (see Discrete Fourier Transform (
DFT)) to a data vector of length n requires n multiplications and n additions—a ......
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