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The authors consider a Gaussian multi-access fading channel with perfect Channel Side Information (CSI) at the transmitters and the receiver. This models many important practical systems including the uplink of wireless LANs and the cellular systems. In a multi-access fading channel, dynamic allocation of bandwidth, transmission power and rates is an important aspect to counter the detrimental effect of time-varying nature of the channel. Most of the existing work on dynamic resource allocation assumes capacity achieving codes for various signaling schemes, such as Code-Division Multiple Access (CDMA), Time-Division Multiple Access (TDMA) and Frequency-Division Multiple Access (FDMA).
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