Thread Subject: How to filter out noise

I have DC 15 volts added with Gaussian white noise

i.e Dc 15 volts + White noise= 15 volts with lot of disturbance

How can I filter out the noise using simulink?

any suggestion will be appriciated.

Sandhi

"Prashant Sandhi" <sanddhi7@gmail.com> wrote in message <hm37t8$a5r$1@fred.mathworks.com>...
> I have DC 15 volts added with Gaussian white noise
>
> i.e Dc 15 volts + White noise= 15 volts with lot of disturbance
>
> How can I filter out the noise using simulink?
>
> any suggestion will be appriciated.
>
> Sandhi

Hi Prashant, do you have the Signal Processing Blockset?

There is a running mean block

>>doc dspblks/mean

Perhaps depending on the variance of your white noise disturbance, it might also be beneficial to lowpass filter it before inputting it into the mean block? Not sure.

Wayne

I'm not sure if I got your question: as far as I now, if you filter white noise you just get a coloured noise. However, if you know that the signal is stable (15 volts) what you need is just the mean of the noise. Then, I can not see why one should have a white noise with means equal 15 and then "filter" to get only the contiuous value when you can just use a constant instead.

"Prashant Sandhi" <sanddhi7@gmail.com> wrote in message <hm37t8$a5r$1@fred.mathworks.com>...
> I have DC 15 volts added with Gaussian white noise
>
> i.e Dc 15 volts + White noise= 15 volts with lot of disturbance
>
> How can I filter out the noise using simulink?
>
> any suggestion will be appriciated.
>
> Sandhi

Thank you guys I will implement it and see.

"Wayne King" <wmkingty@gmail.com> wrote in message <hm38ud$j6f$1@fred.mathworks.com>...
> "Prashant Sandhi" <sanddhi7@gmail.com> wrote in message <hm37t8$a5r$1@fred.mathworks.com>...
> > I have DC 15 volts added with Gaussian white noise
> >
> > i.e Dc 15 volts + White noise= 15 volts with lot of disturbance
> >
> > How can I filter out the noise using simulink?
> >
> > any suggestion will be appriciated.
> >
> > Sandhi
>
> Hi Prashant, do you have the Signal Processing Blockset?
>
> There is a running mean block
>
> >>doc dspblks/mean
>
> Perhaps depending on the variance of your white noise disturbance, it might also be beneficial to lowpass filter it before inputting it into the mean block? Not sure.
>
> Wayne