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Indexing of Discrete Fourier Transforms

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fit curve with fft and calculate it's derivatives

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Inverse Fourier Transform of $\frac{1}{(1+iw)(2+iw)}$

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159
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Does Vandermonde matrix always have its inverse?

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convolution of nearly periodic data

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How to interpret the results of a Discrete Fourier Transform

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Efficient matrix-vector multiplication for "partial" Hadamard matrices

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78
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Fourier transform of the ln of a variable

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131
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Simple DFT Coefficients => Amplitude/Frequencies

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479
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Fourier coefficients computed by MATLAB fft function don't match exact ones

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348
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Finding working modulus for FFT over finite fields

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47
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How to deduce formulae of signal waves?

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64
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What is the Discrete Fourier Transform of a periodic sequence?

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270
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Difference between NFFTs, NUFFTs, USFFTs (for CT purposes)

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201
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Filter a signal using FFT

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