Linked Questions
20 questions linked to/from Why should I zero-pad a signal before taking the Fourier transform?
6
votes
1answer
797 views
How to choose a windowing function when performing a Chirp $\mathcal Z$-transform?
I've got some data sampled at 32 Hz. The only interesting stuff is happening between about 0-8 Hz and I've got to do real time batch processing and detect events with a delay of no more than a second. ...
-1
votes
2answers
576 views
Bin spacing in FFTs
I have a signal that I sample at some frequency (currently 100Hz), and want to extract low frequency information (between 0.8 and 3 Hz)
I have three constraints on this:
I would prefer to compute ...
-1
votes
1answer
530 views
Digital signal and frequency analysis
I am generating a digital signal with software. I have defined the vector
$$[0,1,1,1,0,1,0,1,0,1,0,0,0,0,0,0,0,0,0,0] $$
and my sampling rate is 8 million per second.
The frequency spectrum is ...
0
votes
2answers
181 views
Beginner question on aperiodic samples and DFT behavior
I have a strongly aperiodic signal and I get weird artifacts after running a fft, using a low-pass filter, and then doing an inverse fft. I believe the artifacts are due to the way the signal is ...
2
votes
0answers
249 views
Is there any problem with my FFT method?
I am trying to analysis a system by Fourier Transform. my system has 3 dominant modes. (1,0.05) (0.51,0.01),(0.46,0.01) the pairs are defined as (freq,damping_ratio)
I've got those result with ...