Skip to main content
Signal Processing

Questions tagged [physical-units]

Ask Question

The tag has no summary.

22 questions
Newest Active Bountied Unanswered
0 votes
1 answer
59 views

I am trying to calculate the transfer function between one sensor with velocity timeseries data $y(t)$ and a witness sensor $x(t)$ which monitors position. Both sensors output data in volts, with a ...
user3517167's user avatar
  • 1
3 votes
2 answers
488 views

In continuous time we refer to frequency as "cycles/sec" and then for that created equally the reference "Hz". Then in angular units we have "radians/sec". Mapping to ...
Dan Boschen's user avatar
  • 58.2k
1 vote
1 answer
164 views

I am new to signal processing and I have likely a very easy question but I have found inconsistent answers everywhere. When performing an FFT, does it matter what units the amplitude is in? Currently ...
SirVoos's user avatar
  • 11
6 votes
3 answers
2k views

I'm working on estimating the FFT noise floor for a data acquisition system my colleagues and I are designing. I've read MT-001 several times. In general, I think I get it. However I'm a little stuck ...
FooAnon's user avatar
  • 296
0 votes
0 answers
46 views

I want to convert the in situ reflectance into satellite reflectance using SRF (Spectral response function). I have downloaded the SRF file but I find that the bands wavelengths are different than in ...
DrMona Soliman's user avatar
  • 1
1 vote
0 answers
354 views

I have data from an eye tracker collected while subjects were doing a saccadic task (i.e. fast eyes movements). Specifically, I have the position (in degree) on the x and y axes, collected at 120Hz. ...
fednem's user avatar
  • 11
0 votes
1 answer
196 views

I'm very new to signal processing and can't get ahead: I'm using an Accelerometer to measure the acceleration of i.e. the building vibrations or elements/machinery etc. For creating the spectrum, I ...
Wolfmercury's user avatar
  • 3
1 vote
1 answer
1k views

Let us assume we are talking about real, deterministic, electrical signals $x(t)$ and $y(t)$ (magnitude in Volts). There are different kind of Fourier Transforms. I made a table to summarize: NB: By ...
lostdatum's user avatar
  • 13
2 votes
3 answers
809 views

One thing that has always puzzled me is making the units of an analytically derived Power Spectrum Density (PSD) consistent with the units of an FFT. Let's say we record the output of a frequency ...
user27119's user avatar
  • 199
1 vote
1 answer
86 views

I'm applying a radial low-pass filter on a $H{\times}W$ pixel 2D image $I$ where $H \neq W$. To implement this filter, I apply 2D DFT to $I$ to produce $I'$, the $H{\times}W$ frequency domain ...
tmakino's user avatar
  • 165
0 votes
1 answer
43 views

Suppose I have a $10{\times}10$ pixel image, where each pixel represents 1 mm in physical units, and I apply a Gaussian low-pass filter with $\sigma = 5$. Can I make any statements such as "the ...
tmakino's user avatar
  • 165
-1 votes
1 answer
105 views

I have a voltage signal, on top of which there is some noise. I am interested in the noise components so the way I am trying to do this is to fit the known signal to the data and look at the residuals....
user27119's user avatar
  • 199
2 votes
2 answers
2k views

The continuous-time Fourier Transform (CTFT) of a signal $x(t)$ (with unit $unit$) is: $$X(\omega)=\int_{-\infty}^{\infty} x(t)e^{-i\omega t}dt$$ which should be in $unit\cdot sec$ or $\frac{unit}{...
JZYL's user avatar
  • 175
0 votes
1 answer
60 views

I need to normalize some audio feature measurements I've done with the software Wolfram Mathematica. Coming from a non signal processing background, I have some difficulties understanding what ...
Mumen Raida's user avatar
  • 3
2 votes
1 answer
338 views

If I am looking to do a PSD plot on a signal $x(t)$ with units $m$ then the units I am expecting in the PSD would be $\frac{m^2}{Hz}$ but I can't seem to get this result from the following reasoning: ...
Stephen Jackson's user avatar
  • 197

15 30 50 per page
1
2