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In this paper, we propose an energy-efficient power allocation scheme for the downlink multiuser distributed antenna systems. The objective is to maximize the energy efficiency (EE) under the constraints on per-antenna transmit power and proportional data rates among users. Since EE function is typically defined in fractional form, it is computationally complex to optimize the EE directly. We first...
The challenge of resource allocation which consists of both power and sub channel allocations on the downlink OFDMA system is studied in this paper. Shen et al proposed a power allocation method that is dependent of Lagrange multipliers but a complicated root finding method is involved [1]. To avoid complicated calculation in root finding, we develop new expressions for optimal power with three power...
In this paper, resource allocation for OFDMA system with proportional rate constraints is studied. The objective is to optimize subcarriers and power allocation in order to maximize sum capacity subject to the constraints of total power and proportionality among users' capacity. Optimal solution to the constrained fairness maximization problem is extremely computationally expensive. Previous works...
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