Radio Measurements Log

NTN's radio measurement log records signal data for all available beams and UEs. Each entry contains the measurements simulation time, UE position, Beam id, UE elevation angle, theta (angle subtended by the current beam), slant height, EIRP density, Tx Angular antenna gain, Rx Gain, Shadow fading loss, Pathloss, Shadow loss, Additional loss, Total loss, and thermal noise. CIR (carrier to interference ratio) is calculated at receiver when CIR interference is enabled, as well as SNR and SINR. These logs are useful for analysing NTN performance across beams and UEs.

The NTN Radio Measurements log can be enabled by clicking on configure reports in top ribbon > Plots/Logs > Select NTN Radio Measurements log under Network Logs as shown below.

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Figure-1: Enabling NTN Radio Measurement log.

The NTN Radio Measurement Log.csv file will contain the following information:

  • Time(ms)

  • gNB or eNB Name

  • UE Name

  • Slant height(km)

  • Elevation angle(°)

  • CC_ID

  • Band

  • Channel

  • Layer ID

  • EIRP(dBW)

  • Pathloss(dB)

  • Shadow fading loss(dB)

  • Additional loss(dB)

  • Clutter loss(dB)

  • Total loss(dB)

  • Beamforming Gain(dB)

  • Angular Antenna Gain(dB)

  • UE Rx Antenna Gain(dB)

  • Rx Power(dBm)

  • SNR(dB)

  • SINR(dB)

  • Thermal noise(dBm)

  • Interference power(dBm)

  • CQI Index

  • MCS Index

The log file can be accessed from the Simulations Results Window under the log file drop down in the left pane

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Figure-2: NTN Radio Measurement Log file highlighted in the Results window.