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How do you calculate the SNR in decibels?

1 Answer

To calculate the Signal-to-Noise Ratio (SNR) in decibels, you need to compare the power of the signal to the power of the noise. SNR is a measure of the relative strength of the desired signal compared to the unwanted noise present in a system or a signal transmission. The formula to calculate SNR in decibels is:

SNR (in dB) = 10 * log10(Psignal / Pnoise)

where:

SNR: Signal-to-Noise Ratio in decibels (dB)
Psignal: Power of the signal
Pnoise: Power of the noise

Both the signal and noise power should be measured in the same units for this calculation. The result will be in decibels, which is a logarithmic scale used to express large ratios in a more manageable way.

Remember that a higher SNR value indicates a stronger and cleaner signal, while a lower SNR value suggests more noise relative to the signal.
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