Abstract
The energy efficiency performance of Orthogonal Frequency Division Multiplexing (OFDM) in cellular networks is strongly affected by power allocations and channel allocations due to the inter-cell interference. In this paper, we talk about the energy efficiency optimization problem in OFDM-based cellular networks. To the end, we construct an energy efficiency optimization function, which maximizes energy efficiency and guarantees users' requirement. Because the model proposed is a nonlinear fractional program, which is NP-hard. To solve the model, we use the successive convex appropriate method to appropriate the objective function. And then we use the Lagrange dual method and sub-gradient to address the sub-optimal problem. Simulation results show that energy efficiency is convergence and maximum energy efficiency performance can be obtained.
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