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This letter presents an algorithm with linear complexity and finite convergence time for solving the generalized water-filling (WF) problem. The WF problem is generalized by using a weighted-sum-rate, weighted-sum-power, and peak power constraints. The proposed algorithm solves the optimization problems with concave (power and rate) or quasi-concave (energy-efficiency) objective functions. Additionally,...
In this paper, we propose an optimal resource allocation algorithm that maximizes the energy efficiency (EE) of a downlink (DL) multi-user orthogonal frequency division multiplexing (OFDM) system subject to a constraint on the total transmit power of the base station (BS). We show that the optimal EE is obtained by first allocating each subcarrier to the user equipment (UE) with the best channel power...
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