Suggestion for System id toolbox

The system id toolbox has a way to model noise spectra. You should also include a simulink block to easily generate noise sources from these models.

Answer 1

[Rajiv Singh]

How about:

 NoiseModel = noise2meas(IdentifiedModel);

Then use NoiseModel as a regular LTI model in Simulink and run it with a Gaussian white noise input signal. The output would be a realization of the colored noise described by the identified noise transfer function.