What does mean and variance do in Gaussian noise?

1. What is mean and variance in noise?
2. What is variance of Gaussian noise?
3. Why is mean of Gaussian noise zero?
4. Is noise variance or standard deviation?

What is mean and variance in noise?

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 variance of Gaussian noise?

For Gaussian noise, this implies that the filtered white noise can be represented by a sequence of independent, zero-mean, Gaussian random variables with variance of σ² = N_o W. Note that the variance of the samples and the rate at which they are taken are related by σ² = N_of_s/2.

Why is mean of Gaussian noise zero?

Gaussian white noise (GWN) is a stationary and ergodic random process with zero mean that is defined by the following fundamental property: any two values of GWN are statis- tically independent now matter how close they are in time.

Is noise variance or standard deviation?

In some situations, the mean describes what is being measured, while the standard deviation represents noise and other interference.