Energy Efficiency optimization in OFDM Power Telecommunication Network

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. This paper presents the energy efficiency optimization problem in OFDM-based cellular networks. To the end, an energy efficiency optimization function is constructed, which maximizes energy efficiency and guarantees users' requirement. Since the model proposed is a nonlinear fractional program, which is NP-hard. To solve the model, the paper uses the successive convex appropriate method to appropriate the objective function. And then it uses 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.