Optimal energy-efficient power allocation with physical network coding in 60GHz OFDM system

Abstract

In this letter, we investigate energy-efficiency power allocation (PA) based on physical layer network coding (PNC) in 60GHz orthogonal frequency division multiple (OFDM) system. To optimization the energy-efficiency with required system throughput requirement, we formulate the objective task as a constrained minimization problem. The closed form minimum power allocation solutions are obtained by analyzing Karush-Kuhn-Tucker (KKT) conditions. Based on the derived solution, we propose a novel optimal energy-efficient power allocation (OE-PA) scheme. Numerical results have demonstrated the energy-efficient optimality of the derived scheme as compared to other conventional power allocation schemes.