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Thread: Atoll Model Calibration

  1. #1
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    Default Atoll Model Calibration

    Hi friends
    I faced problem with model calibration in atoll by DT data. calibration is done but atoll considered a big loss for different clutter classes so the output of calibration is not acceptable. after calibration max coverage is only 300m! I double checked the DT data and that is correct. is there any parameter that I should define or consider before calibration? all steps done based on atoll guide. I used Atoll ver. 3.3.2.11 with med.
    any help would be appreciated.

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  3. #2
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    Default Re: Atoll Model Calibration

    HI!
    What technology did you test TD? What frequency is used for your technology? What distribution model did you calibrate?
    BR Slava

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  5. #3
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    Default Re: Atoll Model Calibration

    Thanks for your reply
    I'm trying to calibrate model for LTE B7 using SPM.

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    Default Re: Atoll Model Calibration

    Ok. Look at the mail.
    BR Slava

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    Default Re: Atoll Model Calibration

    Quote Originally Posted by mahdi View Post
    Hi friends
    I faced problem with model calibration in atoll by DT data. calibration is done but atoll considered a big loss for different clutter classes so the output of calibration is not acceptable. after calibration max coverage is only 300m! I double checked the DT data and that is correct. is there any parameter that I should define or consider before calibration? all steps done based on atoll guide. I used Atoll ver. 3.3.2.11 with med.
    any help would be appreciated.
    What resolution of map you use?

  8. #6
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    Default Re: Atoll Model Calibration

    Quote Originally Posted by macro View Post
    What resolution of map you use?

    the resolution is 20m

  9. #7
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    Default Re: Atoll Model Calibration

    Quote Originally Posted by mahdi View Post
    the resolution is 20m
    I think because of high resolution you have a problem, because via calibration for example two different points of CW (different by clutters in real life) lie in the same clutter on map

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  11. #8
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    Default Re: Atoll Model Calibration

    Assuming that you have a drivetest with RSRP, did you extract the CW from the DT and calibrate after with that? If I remember well the manual was not very explicit how to do some steps.
    Some people calibrate the model tunning directly with the imported DT as a CW. It will give you a completely different thing.

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    Default Re: Atoll Model Calibration

    In Atoll-3-3-2-Model-Calibration-Guide (you can download the manual here: ) the procedure for calibrating the propagation model is described in sufficient detail. But, in reality, after calibrating the model and performing a coverage calculation, there is a noticeable difference between the real DT measurements and the calculated ones. I was unable to match.
    Last edited by slava121; 2022-07-12 at 02:13 PM
    BR Slava

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  14. #10
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    Default Re: Atoll Model Calibration

    Quote Originally Posted by slava121 View Post
    In Atoll-3-3-2-Model-Calibration-Guide (you can download the manual here: ) the procedure for calibrating the propagation model is described in sufficient detail. But, in reality, after calibrating the model and performing a coverage calculation, there is a noticeable difference between the real DT measurements and the calculated ones. I was unable to match.
    Thanks for all comments specially my friend @salva121
    I found the problem. it was because of main project file. when I imported all sites in new project everything work fine.

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