Ultra-Wideband Communications: Fundamentals and Applications

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A.3. CDMA-Based Cellular Systems

In CDMA, the uplink is generally the limiting link in terms of capacity [2]. 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

Equation A-21

Now the interference due to the UWB transmitters can be introduced to modify I_CDMA to

Equation A-22

The signal-to-interference ratio, SIR, for a particular user's signal ...

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