Multibeam Satellite Communications With Energy Efficiency Optimization

Energy efficiency (EE) is an important aspect of satellite communications. Different with the existing algorithms that typically use first-order Taylor lower bound approximation to convert non-convex EE maximization (EEM) problems into convex ones, in this letter a two-step quadratic transformation method presented. In first step, fractional form achievable rate over total power consumption converted non-fractional based on transformation. second signal interference-and-noise further form, still After transformation, original EEM problem equivalent one. Then alternating optimization algorithm presented solve it by iteratively performing two stages until stop condition satisfied. Simulation results show can fast converge and its performance better than sequential multibeam interference mitigation algorithm.