New answers tagged dft
2
votes
FFT Filter design
FIR with overlap-add design
That is typically an FFT-based filtering approach, not an alternative to one. You might be confusing things.
So, in my case, I really need a FFT filter design since I'm ...
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0
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Equivalence between "windowed Fourier transform" and STFT as convolutions/filtering
Yes, there is an equivalence there: what people call "STFT transform of length $N$ with hopsize $H$" is the polyphase implementation of what you could call "a multirate filterbank with $...
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1
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Accepted
Computing the DFT of three sine waves with Aliasing
Of course, the FFT is the fastest approach to compute the DFT, but if the intention was to analytically derive an equation for the expected result for these specific tones, the approach looks good ...
- 55k
0
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Why we can't implement an ideal digital filter in the frequency domain and then anti-transform?
The problem with the sinc function is not that it is infinitely long. The problem is that it is infinitely non-causal, i.e., it extends infinitely towards negative times. All implementable IIR filters ...
- 92.4k
2
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Why we can't implement an ideal digital filter in the frequency domain and then anti-transform?
Why is not possible to simply pick up the ideal DFT of a low pass filter (with a certain number of samples), then multiply it with the DFT of the input and finally [inverse] transform to the time ...
- 21.4k
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