Reply To: Path loss, input rate & min. throughput

Bashar Tahir


1) This is determined by how you enter the schedule. For example, let us say you have four users: UE1, UE2, UE3, UE4. You want UE1 and UE2 to supposedly be the strong UEs (e.g., cell-center), and UE3 and UE4 to be the weaker ones (e.g., cell-edge), then the downlink schedule should be:

scStr.schedule.fixedScheduleDL{1} = ['UE1:36,UE2:36,UE3:UE1,UE4:UE2'];

This indicates that UE3 is superimposed on UE1, and UE4 is superimposed on UE2. You should try to set the pathlosses in a reasonable way. It depends really on how you define your cell conditions. A difference of at least 10dB between cell-center and cell-edge can be a reasonable starting point maybe?

You can find more information in the user’s manual (the NOMA example scenario and the main NOMA section).

2) I am not sure what do you mean by “input rate”.

3) It depends on the allocated bandwidth, the current CQI, and the current spatial configuration. The minimum would correspond to a CQI of 1, with a single spatial stream transmission, while the maximum would correspond to maximum number of spatial streams together with the highest CQI of 15. Note for the NOMA farUE (cell-edge), its maximum CQI is limited to 6 (assuming cqiTable 0), since in the standard, 3GPP MUST only supports QPSK modulation for farUE.