Spectral-Energy Efficiency Trade-Off Based Design for Hybrid TDMA-NOMA System

The combination of time division multiple access (TDMA) and non-orthogonal (NOMA), referred to as hybrid TDMA-NOMA system, is considered a potential solution meet the unprecedented requirements for future wireless networks. While recent resource allocation techniques aiming individually maximize either spectral efficiency (SE) or energy (EE), this paper considers an SE-EE trade-off based technique system. This design offers additional degree freedom in allocation. proposed formulated non-convex multi-objective optimization (MOO) problem. MOO framework reformulated single-objective (SOO) problem by combining multi-objectives through weighted-sum objective function. With this, each original objectives assigned with weight factor reflect its importance design. Then, sequential convex approximation (SCA) second-order cone (SOC) approach are jointly utilized deal non-convexity issues SOO Simulation results reveal that strikes good balance between functions, while meeting instantaneous