confidence intervals

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  • #14900
    Farhan
    Participant

    Hi,
    I want to ask how confidence intervals are calculated for a given simulation. For example for MassiveMIMO Scenario, the graph contains some large intervals and some small one in terms of length of Intervals? does that mean something different or its just the same thing?

    #14901
    Bashar Tahir
    Participant

    Hi,

    The confidence intervals are calculated via bootstrapping. This is performed in +Results/SimulationsResults.m by calling the function Utils.Extras.bootci.
    By default, a 95% confidence level is used when calling that function. You can find some details here: https://en.wikipedia.org/wiki/Confidence_interval .

    Roughly speaking, they indicate the accuarcy of your simulated results. Large confidence intervals correspond to uncertain results, meaning that if you repeat the simulation, you are less likely to get a similar average value (of the throughput for example). In order to make them smaller, and therefore make the results more accurate and representative, you should increase the number of simulation samples by increasing the number of simulated frames, i.e., set scStr.simulation.nFrames to a larger value in the scenario file.

    Best,
    Bashar

    #14902
    Farhan
    Participant

    Hi Bashar,

    Thanks, just to clarify this symbol “Ī” on graphs of MassiveMIMO Scenario (Corresponding X-Axis value 4, 8, 12, 16, 24, 32, 64 of nAntennasBaseStations) do corresponds to confidence Interval?

    • This reply was modified 5 days, 11 hours ago by Farhan.
    #14907
    Bashar Tahir
    Participant

    Yes, as shown in the picture below.

    confidence interval

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