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We characterize the optimum power control policies that achieve arbitrary rate tuples on the boundary of the capacity region of a power controlled, code division multiple access (CDMA) system in a fading channel with perfect channel state information (CSI). We propose a "generalized" waterfilling approach, and provide an iterative algorithm that solves for the optimum power allocation policy,...
In this paper a symbol synchronous CDMA system with processing gain where all the users transmit to a single receiver is considered. The receiver and the transmitter have perfect knowledge of the channel states. The set of long term achievable rates, i.e., the capacity region, for a power controlled scalar multiaccess channel is characterized for fading CDMA. The capacity region of a fading CDMA channel...
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