wiki:Manual/Algorithms/Basics/PowerControl

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Power control

Several Power Control algorithms have been implemented in SEAMCAT

If the Power control option is activated in the scenario settings for Interfering Link Transmitter (ILT), the active transmit power of ILT will be re-calculated for each event depending on the signal strength between ILT and Interfering Link Receiver (ILR). The resulting ILT transmit power is calculated as follows:

where is the ILT signal power received at the ILR:

The calculation of the power control gain applied at ILT will depend on the three input parameters defined in the Power control section of the ILT in the scenario:

  • - power control dynamic range (dB)
  • - power control step (dB)
  • - power control minimum threshold (in dBm, for signal received at ILR)

Depending on the strength of the ILT signal received at ILR, the following three modes of power control operation are envisaged:

  • - i.e. the power of the received signal is less than the minimum threshold of power control, then the following will apply:


  • - i.e. the power of the received signal is within dynamic range of power control, then the following will apply:


where i is an integer ranging from 1 to n_steps =

  • - i.e. the power of the received signal exceeds the threshold more than the dynamic range of power control, then the following will apply:


The power control, in the victim link, is a simplified power control mechanism which ensures only that a certain dRSS is not exceeded in the victim receiver.

The “receive power dynamic range” input parameter (denoted Pcmax) is the maximum range of the receive power that a victim receiver can accept, in terms of the maximum receive power over the Vr’s sensitivity threshold. This means that if the trialled dRSS value exceeds (sens+Pcmax), the dRSSmax is set to the “sensitivity” + “Receive power dynamic range”. The figure (a) and (b) below present an example on how to set the PC off and on respectively and illustrates the effect of the power control in the victim link for PC off and on respectively.

OFDMA UL Power Control

detailed information about the OFDMA UL power control is available here

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