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Joint Allocation of Subcarriers and Transmit Powers in a Multiuser OFDM Cellular Network

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4 Author(s)
Thanabalasingham, T. ; ARC Special Centre for Ultra Broadband Information Networks, Department of Electrical and Electronic Engineering, University of Melbourne, Australia. thaya@ee.unimelb.edu.au ; Hanly, S.V. ; Andrew, L.L.H. ; Papandriopoulos, J.

In the present paper, we consider the problem of joint bandwidth (subcarriers) and power allocation for the downlink of a multi-user multi-cell OFDM cellular network. This resource allocation problem is formulated as a power minimization problem, subject to meeting the target rates of all users in the network. We develop a distributed solution to find the globally optimal allocation which determines the subcarrier and power allocation dynamically. In addition, we investigate the impact of reducing the complexity by reducing the number of degrees of freedom available in the optimization. In particular, we consider a static bandwidth allocation scheme, and a static power allocation scheme. The numerical results show that the penalty on network performance due to the reduction in the available degrees of freedom is not significant.

Published in:

Communications, 2006. ICC '06. IEEE International Conference on  (Volume:1 )

Date of Conference:

June 2006

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