Regenerative Strategy for Sum-rate Enhancement in Bi-directional Three-node Cooperation

【摘要】 <正> In bi-directional three-node cooperation,one regenerative strategy with network coding and poweroptimization is proposed for system sum-rate under a total energy constraint.In this paper,the networkcoding and power optimization are applied to improve system sum-rate.But max-min optimization problemin power allocation is a NP-hard problem.In high Signal-to-Noise Ratio regime,this NP-hard problem istransformed into constrained polynomial optimization problem,which can be computed in polynomialtime.Although it is a suboptimal solution,numerical simulations show that this strategy enhances the sys-tem sum-rate up to 45% as compared to a traditional four-phase strategy,and up to 13% as compared tothe three-phase strategy without power optimization.更多还原

【Abstract】 In bi-directional three-node cooperation,one regenerative strategy with network coding and power optimization is proposed for system sum-rate under a total energy constraint.In this paper,the network coding and power optimization are applied to improve system sum-rate.But max-min optimization problem in power allocation is a NP-hard problem.In high Signal-to-Noise Ratio regime,this NP-hard problem is transformed into constrained polynomial optimization problem,which can be computed in polynomial time.Although it is a suboptimal solution,numerical simulations show that this strategy enhances the sys- tem sum-rate up to 45% as compared to a traditional four-phase strategy,and up to 13% as compared to the three-phase strategy without power optimization.更多还原