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Excel sheet to estimate range for Indoor and Outdoor

Genius 16450 points

Replies: 80

Views: 101121

Hi,

The attached excel sheet helps to estimate a practical range estimation for indoor and outdoor radio links.

The outdoor is based upon Line-of-Sight (LOS). For the indoor estimation, construction materials can be selected that are between the Tx and Rx unit. The greater the attenuation of the combined material between the Tx and Rx unit, the shorter the distance.

This has been used a lot in TI seminars and is a helpful tool for calculating a realistic and conservative range expectation.

The latest version is available at: http://www.ti.com/tool/rf-range-estimator

Latest version (1.17) has been updated to include:

  • CC2640R2F - 500 kbps (BLE)
  • CC2640R2F - 125 kbps (BLE)

Any feedback is welcomed.

Regards, Richard

 

80 Replies

  • Genius 16450 points

    In reply to Harry:

    Ver 1.08: updated with support for CC2564, CC31xx and CC32xx and added link to documentation

     

  • Hi, Richard

    could you modified sheet to have option to set "Practical sensitivity level" to any value?

    It could be useful to compare a measured RSSI vs calculated one for specific distance.

    I did CC13xx range test with DN038 antennas. My practical result is not far from your calculator. I just had to change Transmitted power in calculator (from 14 to 7 dBm) to be in comply with my real RSSI (-84 dBm vs fixed -91 dbm)

  • Genius 16450 points

    In reply to Oleg Pushkarev:

    Hi Oleg,

    I can add this to the next release. Good to hear that there is a good correlation.

    Have updated the version to Rev 1.11 now that supports the new Long Range Modes from CC13xx and improved the accuracy of predicted range a little bit more.

    Regards,
    Richard

     

  • In reply to RGW:

    Hello richard,

    Thanks for your work, it's very interesting.

    I'm currently working with the CC1120, and I'm interested in range / sensitivty optimization.

    On the application report SWRA479, chapter4, you talk about sensitivity levels, and we can see for Sub 1Ghz devices  : CC1120 CC1190 - 0.6 Kps (LRM)

    What do you mean by "LRM", is it a way to say we must set the CC1120 register with parameters you give on table 8 ?  It don't match with the generic setting that I find in smartRF studio (in smart RF studio, we have somthing like : "Bit rate 1.2 Kbps, 2 FSK, narrowband, optimized for sensitivity)

    Thierry

  • Guru 251810 points

    In reply to thierry venet:

    For more details about the LRM including software and a Usermanual, see processors.wiki.ti.com/.../Category:Sub-1GHz

     

  • In reply to TER:

    Thanks for the answer, but I wonder what's exactly mean LRM. There is a lot of information on the wiki, perhaps for C1120 LRM, but where ? 

    Since there is nothing about LRM in the CC1120 user guide, I expect that, when richard wallace talk about "CC1120 LRM", it talk about long range module, and it mean he use the "TIDC-CC1120-LRM-868-915MHZ" reference design...

    I found this :
    www.ti.com/.../TIDC-CC1120-LRM-868-915MHZ Documents

    It seems that special software is used to achieve ultra narrow band communication, where can we find more informations about software setting for LRM ?

  • Guru 251810 points

    In reply to thierry venet:

    See processors.wiki.ti.com/.../Cc112x_cc120x_lrm, the wiki has been reorganized a bit. Here you find the documentation and software.

     

  • In reply to TER:

    Ok it's the good link, thanks !

    thierry
  • In reply to TER:

    Hi,

    Are CC112x LRM settings the same as for CC1310 LRM?

    Will these chips (CC112x and CC1310) communicate with each other in "LRM" modes?

    Best regards,

    Oleg

  • Guru 251810 points

    In reply to Oleg Pushkarev:

    No, CC112x and CC1310 LRM is not the same. CC112x uses narrowband (explained here: processors.wiki.ti.com/.../Cc112x_cc120x_lrm). Since CC1310 is not a narrow band device CC1310 uses DSSS for LRM.

     

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