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This paper addresses the problem of resource allocation and Quality of Service (QoS) management in a downlink communication system where the users are allowed to be attached to and receive data from one or several cooperating Base Stations (BSs) under Orthogonal Frequency Division Multiple Access (OFDMA). Under the assumption that only information regarding the link path loss is available at each transmitter, the problem of power and bandwidth allocation to minimize transmission power subject to minimum rate (i.e., QoS) constraints is written as a convex optimization problem.
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