Questions tagged [scaling]

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55 views

Scaling issue after doing manipulations in FFT

I have two filters which must apply (in series) to same input data $x[n]$ e.g of length 256 (real time asio input buffers). One filter is e.g. an impulse response $h_1[n]$ of a speaker and other one ...
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125 views

Why is noise a power signal?

1. I'm generating a power signal: ...
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17 views

Math.Net and alglib returning different FFT outputs by default

I am developing an application in C# with spectrogram drawing functionality. For my fist try, I used MathNet.Numerics, and now I am continuing to develop with alglib. When I changed from one to the ...
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39 views

Where to apply zero-padding for convolution dealiasing and appropriate scale

After hours of browsing the DSP posts and resources online, I still struggle to understand why my code diverges when I activate zero-padding dealiasing. When I deactivate it, everything 'works well', ...
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57 views

Correctly scaling FFT of different lengths

I have been looking at using two FFTs of different lengths and displaying the output magnitudes on the same graph (a shorter length window for the higher frequencies, and a longer one for lower ...
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24 views

How can single low-resolution have multiple high-resolution versions?

I'm trying to prove the fact that the super-resolution problem is an ill-posed problem. Having a single low-resolution image, we can generate multiple high-resolution images. Which also known by ...
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13 views

Wavelet Analysis Magnitude Scale

I am trying to plot magnitude against frequency averaged over a time window. To do this I make a morlet wavelet Filterbank. And multiply the dft of each kernel by the dft of my incoming data set. ...
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170 views

Correctly scaling Power Spectrum and Correlation Function of Galaxies from Mock Catalogues

I'm currently writing a code to compute the two-point correlation function of a set of galaxies. As I work with a loooot of galaxies, it was suggested to me not to do it in real space, but to compute ...