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Thread Subject:
Band limited white noise

Subject: Band limited white noise

From: Dale

Date: 5 May, 2009 01:38:01

Message: 1 of 3

I started exploring the Band limited white noise block in Simulink and discovered that it is just a random number generator that has a zero mean and unit variance, multiplied by a gain block. The confusing thing however is that this gain block has as its gain:

[sqrt(Cov)]/[sqrt(Ts)]

I am confused about where 'Cov' and 'Ts' are coming from. They are not workspace variables, and I am wondering if there are some 'global' variables that simulink has that aren't so obvious. There is a cov function that takes vector arguments and computes the covariance, but 'Cov' here seems to be used as a variable, not a function. Can anybody explain this?

Thanks,
~Luke

Subject: Band limited white noise

From: dab483

Date: 19 May, 2012 20:24:13

Message: 2 of 3

Hi,

have you got the answers for your question here? mind to share with me? thank you.


"Dale " <hazelREMOVETHISnusse@gmail.com> wrote in message <gto59p$je3$1@fred.mathworks.com>...
> I started exploring the Band limited white noise block in Simulink and discovered that it is just a random number generator that has a zero mean and unit variance, multiplied by a gain block. The confusing thing however is that this gain block has as its gain:
>
> [sqrt(Cov)]/[sqrt(Ts)]
>
> I am confused about where 'Cov' and 'Ts' are coming from. They are not workspace variables, and I am wondering if there are some 'global' variables that simulink has that aren't so obvious. There is a cov function that takes vector arguments and computes the covariance, but 'Cov' here seems to be used as a variable, not a function. Can anybody explain this?
>
> Thanks,
> ~Luke

Subject: Band limited white noise

From: Phil Goddard

Date: 22 May, 2012 02:30:08

Message: 3 of 3

Cov is the Noise Power and Ts is the sample rate that is entered on the block dialog.

Phil.

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