Date Added: Apr 2009
This paper proposes a two-step method to maximize the good-put transmitted by the base station in multiuser orthogonal frequency division multiplexing systems based on sub-channel, bit and power allocation. The problem is formulated as a Binary Integer Programming (BIP) problem, in which the utility function to be optimized is modified with a fairness parameter. The application of the proposed method leads to a less complex BIP problem that is solved optimally by a branch- and bound algorithm. The authors further propose a suboptimal rounded linear programming algorithm that significantly reduces the complexity and does not sacrifice much performance.