Optimal Resource Allocation in OFDMA Downlink Systems With Imperfect CSI

In this paper, the authors address the problem of joint scheduling and resource allocation in the downlink of an Orthogonal Frequency Division Multiple Access (OFDMA)-based wireless network when the per-user SNR is known only in distribution. In particular, they consider sum-utility maximization over user schedules, powers, and code rates, subject to an instantaneous sum-power constraint. They consider both a "Continuous" scenario where, during a time-slot, each OFDMA subchannel can be time-shared among multiple users and/or code rates, and a "Discrete" scenario where no time-sharing is allowed.

Provided by: Ohio State University Topic: Mobility Date Added: Feb 2011 Format: PDF

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