Noise

Fixed SNR with unitary noise variance

Fixed SNR with unitary noise variance
  1. How do you calculate noise variance?
  2. What is the equation for SNR signal-to-noise ratio?
  3. Does the SNR value affect the white noise?

How do you calculate noise variance?

The noise variance is calculated as the mean of the difference between these two frames, the corresponding signal value is calculated as the mean over all the signal values in these frames. The graph in Figure 1 (a) shows the variance plotted over the respective mean signal value.

What is the equation for SNR signal-to-noise ratio?

The signal to noise ratio (SNR) caused by jitter is displayed in the following equation:SNRdBFS=−20log2πfinσwhere σ represents the clock jitter in seconds, and fin is the input signal's frequency.

Does the SNR value affect the white noise?

For higher SNR values (e.g. SNR ≥ 6 dB), the time-frequency representation and PSD of the signal were not significantly affected by the white noise presence. For SNR < 6 dB, the time-frequency representation started to become distorted.

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