# Tag Info

## Hot answers tagged sampling

### Resampling in frequency domain

Mirroring the spectrum would be trivial by multiplying with alternating +/-1, but since the OP mentioned in the comments under the question that it is to be done with resampling and filtering alone. A ...
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Accepted

### How to be sure that we chose the correct sampling rate in pratice?

If the signal bandwidth is not known (and spectral characteristics in general) and test equipment such as a spectrum analyzer is not available, then my recommendation is to sample at the highest rate ...
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### How to be sure that we chose the correct sampling rate in pratice?

Multiple options Theoretical analysis use fluid dynamics or mechanical analysis to roughly determine the frequency content of your signal. What are the main resonance mechanisms and what frequencies ...
• 36.9k
Accepted

### Frequency constraints on a down-sampled signal

Yes, if "original frequency" refers to half of the original sampling rate, with caveats so let's review the main concepts. Assuming the resampling is done by upsampling (zero insert), ...
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### Does power spectral density change with sampling rate?

If this is with regards to a measurement of sampled white noise with an FFT (let’s assume without further windowing where the resolution bandwidth is simply $f_s/N$), where there was proper ...
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• 14.1k
1 vote
Accepted

### IQ Constelation Diagram of FSK signal

The OP is correct with the intuition that the IQ diagram for the FSK signal should remain on the unit circle. All forms of FSK are constant envelope signals, as we see clearly in the time domain plot ...
• 41.1k

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