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Results tagged with zero-padding
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user 4346
Zero padding consists of extending a signal (or spectrum) with zeros to extend its time (or frequency band) limits.
1
vote
Relationship between z-transform and DFT
here is the relationship in a quick and concise (or terse) manner:
discrete-time signal: $x[n]$ where $n$ is an integer.
Z transform:
$$ X(z) \triangleq \sum\limits_{n=-\infty}^{+\infty} x[n] \ z^{ …
- 21.5k
3
votes
remove zero padding effect crosscorrealation
so let's say the length of your FFT is $N$. let's say that you fill half of the buffer with your signal and fill the other half with zeros.
$$ x[n] = 0 \quad \text{ for } \tfrac{N}2 \le n < N $$
…
- 21.5k
1
vote
FFT: Removed padded zeroes?
to interpolate in the image domain, you don't do any zero padding there. take your entire image, FFT it, and with the properly swapped quadrants, zero pad that in the 2D-frequency domain. the IFFT i …
- 21.5k
3
votes
How to Zero Pad in Order to Perform Filtering in the Fourier (Frequency) Domain?
The reason why this zero-padding is necessary is that if you will be filtering (or convolving) $f$ and $h$ using multiplication in the frequency domain and you're using a computer to do it to the nume …
- 21.5k