Reducing autocorrelation of a time series

[iibewegung]

Hi,
Is there like some widely accepted threshold for autocorrelation time of a time series for it to be considered "uncorrelated"?
I used MATLAB to generate approx. 1000 gaussian random numbers and found their autocorrelation time to be approx. 1.07... is this small enough for it to be called white noise?

If not, can anyone tell me some ways to reduce the autocorrelation of a simple time series?
I heard sub-sampling is one way... is there anything else?
If someone can perhaps tell me the name of the method, I think I can look it up and do the rest.

Thanks in advance.

 

[Valkarie]

There is no widely accepted threshold for autocorrelation time of a time series to be considered "uncorrelated". It is usually determined on a case-by-case basis, depending on what you are trying to achieve with the data. Sub-sampling is one method that can be used to reduce the autocorrelation of a simple time series. Other methods include differencing, smoothing, and detrending. These methods work by removing patterns from the data that are causing the autocorrelation. For more information, you can read about time series analysis and the various methods for reducing autocorrelation.