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2 votes

Use DFT (`fft()`) to Replicate 2D Convolution (`conv()`)

HINT ...
Engineer's user avatar
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2 votes

How does function c2d in MATLAB manage fractional delay?

The zero-order hold (ZOH) discretization is the same as the step-invariant method, which means that the step response of the discrete-time system equals the continuous-time step response at the sample ...
Matt L.'s user avatar
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1 vote

Matlab: Different 1-D FFT results with and without zero-padded

The mean of signal $x$ is not zero. Try on the first line: $X=\texttt{fft}(x-\texttt{mean}(x))$.
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