MATLAB: How to implement nise of specific bandwidth

noise

Best Answer

Take a broadband noise and the use a bandpass filter. Keep in the mind that the noise samples will be autocorrelated after you use the bandpass filter.

Related Solutions

MATLAB: Simulink has bandwidth

Simulink doesn't have bandwidth in the way you are thinking.

Simulink accesses devices at normal priority using standard device drivers, and works on the assumption that there are many different things that it might need to do. Programs such as VirtualDub use whatever tricks and advanced features they can, knowing that their only task is to work with one device.

With Simulink acting as a normal program handling multiple tasks, it is subject to standard operating system scheduling rules and to general-purpose interface procedures. Those scheduling rules allow Simulink to be interrupted by (e.g.) anti-virus programs and whatever else is happening, and the interfaces take their time about getting data back and returning control to Simulink. Simulink probably just can't keep up. VirtualDub knows how to hog the system however it can in order to improve performance.

There might be ways to improve the performance you are getting, but you should expect to get rates notably lower than you get with VirtualDub.

MATLAB: How to generate band-limited Gaussian white noise?

You cannot generate band-limited "white" Gaussian noise. "White" noise means that the power spectral density is flat, which contradicts the notion of a passband.

You can generate band-limited Gaussian noise. I'm not sure what you mean by "...signal ranging from 0 to 3 with a frequency of 0-6Hz", so I'll assume that you want a passband of 0 to 6 Hz. You did not tell us your sampling frequency, I'll assume 100 Hz.

      Fs = 100;
      d = fdesign.lowpass('Fp,Fst,Ap,Ast',6,10,0.5,40,Fs);
      B = design(d);
      % create white Gaussian noise the length of your signal
      x = randn(1000,1);
      % create the band-limited Gaussian noise
      y = filter(B,x);

The output, y, is a band-limited Gaussian noise with a passband of 0 to 6 Hz.

Best Answer

Related Solutions

MATLAB: Simulink has bandwidth

MATLAB: How to generate band-limited Gaussian white noise?

Related Question