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Re: frequency content of whitenoise block
Posted:
May 10, 2011 2:14 AM
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"Wayne King" <wmkingty@gmail.com> wrote in message <ipr8g8$jch$1@fred.mathworks.com>...
> "Chaitanya Vichare" <cavichare@gmail.com> wrote in message <ipqs8d$34c$1@fred.mathworks.com>...
> > Dear Reader
> > Ideally white noise has infinite frequencies but what about the white noise block in simulink? How to get its frequency contents? Does it have infinite or finite frequencies?
> > Please inform me.
> > Thank You
>
> Hi Chaitanya, The mathematical model for a white noise sequence has a continuous spectrum (what you are calling infinite frequencies) because the sequence is doubly-infinite. Furthermore, the PSD is perfectly flat and the autocorrelation is identically zero at all nonzero lags, you must realize that anything implemented in a computer can only approximate that.
>
> When you say "white noise block" in Simulink, are you actually referring to the "Band-Limited White Noise Block"?
>
> Wayne
Thanks Wayne
Yes I want to mean "Bandlimited white noise", but I can not finding the limit of spectrum. Please tell me how to find it
Once again Thank You
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