In CDMA, the uplink is generally the limiting link in terms of capacity . Consider N mobiles communicating to a single isolated base station. Assuming perfect power control, the signal from each mobile is received at the base station at its target power, S. Therefore, the interference from N – 1 interfering mobile stations is
Now the interference due to the UWB transmitters can be introduced to modify ICDMA to
The signal-to-interference ratio, SIR, for a particular user's signal ...