Home > Archive > Matlab > April 2005 > how to define my bandwith of white noise in Simulink?
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| Author |
how to define my bandwith of white noise in Simulink?
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| seable 2005-04-09, 8:58 pm |
| I am using the band limited white noise block in Simulink.
My question is, if I want to produce a white noise signal with
0-100Hz bandwith, how should I set the sample time and Noise power?
BTW, I have the system sample rate of 2000Hz.
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| martin alain 2005-04-11, 4:00 am |
| seable wrote:
>
>
> I am using the band limited white noise block in Simulink.
>
> My question is, if I want to produce a white noise signal with
> 0-100Hz bandwith, how should I set the sample time and Noise power?
>
> BTW, I have the system sample rate of 2000Hz.
Dear seable,
A white noise with a limited bandwith is not a white noise.A white
noise is impredictible and has an infinite bandwith.You want to build
a colored noise, just apply a low pass filter with the specified
bandwith (100hz), for example a first order filter,to the "white"
noise .
x'=-x/tau+white noise the bandwith (3db) is 1/tau (rd/s)
Your sample rate is 2000hz, no problem with discretization, or
shannon reconstruction.
Alain
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