Power control for multirate CDMA systems with interference cancellation
Siu Man Shum, R.S. Cheng · 2002
We consider a wireless multirate CDMA system with perfect successive interference cancellation (IC). Different services have different rates, quality of service (QoS) requirements. We formulate the problem as a constrained optimization problem with the objective of minimizing the total transmission power. An optimal power control strategy is derived. We find that ranking users in descending order of channel gain can minimize the total transmission power of the users, regardless of the users' data rate and QoS requirements.