Logarithmic scale transmitted power is divided by linear pathloss and shadowing

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  • #10736
    Roya
    Participant

    I have just noticed in UE.m script, the eNodeB power in logarithmic scale, is divided by pathless and shadowing values in linear scale, and then later on it is again converted to logarithmic scale and counted as SINR in dB. Is there any logic behind this?
    The SINR values in this way are higher than the actual ones which I believe is not correct!

    #10814

    Dear Roya,

    ok, I think I know where the confusion comes from.

    In LTE_sim_main_launcher_demo_basic.m, there is the line

    % LTE_config.eNodeB_tx_power = 46; % 46 dBm

    The problem here is, that the TX power is specified in Watt, and that it says dBm here is a mistake. If you check the corresponding config file +simulation_config/hex_grid_tilted.m, you find in line 104

    LTE_config.eNodeB_tx_power = 40; % eNodeB’s transmit power, in Watts.

    The SINR calculation in the UE file is thus consistent, all values are linear.

    We will updated the launcher file and get rid of the ‘dBm’ to avoid further confusion. Not sure how it got there, sorry about that…

    If you have further questions, please let me know!

    Best regards,
    Martin

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