The White noise block outputs normally distributed random numbers.
•The difference between this block and the Random number block is that the white Noise block generates the signal at a specific sample rate, which is related to the correlation time of the noise.
•Theoretically, continuous white noise has:
•Acorrelation time of 0
•Flat power spectral density (PSD)
•Covariance of infinity
•
•The correlation time of the noise is set by the sample time parameter.
•The White noise block can simulate such a white noise by setting a correlation time much smaller than the shortest time constant of the system.
Dialog box
Figure 1 White Noise dialog box
Parameters
|
Parameter(s) |
Description |
|
Noise Power |
Enter the height of PSD of white noise. |
|
Sample Time |
Enter the correlation time of noise. |
|
Seed |
Enter the initial seed of random number. |