单向放大转发中继D2D通信系统可达速率分析与联合功率优化

发布时间：2018-11-27 15:31

【摘要】：描述了基于放大转发中继underlay模式下的D2D传输模型,研究了用户最大发射功率受限前提下利用单向放大转发中继的D2D通信系统功率分配方法.首先从D2D系统端到端信干噪比表达出发,推导出D2D链路和蜂窝上下行链路的可达和速率,据此建立了可达和速率的联合功率优化模型,根据功率约束条件将双目标优化模型转化为单目标优化模型;然后采用Pareto优化方法最大化可达和速率,并提出相应的低复杂度实现算法.仿真结果表明:在中低信噪比区域,基于放大转发中继辅助的D2D通信性能显著优于传统D2D通信模式,采用Pareto功率优化方法可进一步提升D2D通信以及蜂窝上下行链路的系统可达和速率.
[Abstract]:This paper describes a D2D transmission model based on underlay mode for amplifying and forwarding relay, and studies the power allocation method of D2D communication system using one-way amplification relay under the premise of maximum transmit power limitation. Based on the end-to-end signal-to-noise ratio expression of D2D system, the reachability rate of D2D link and cellular uplink and downlink is derived, and the joint power optimization model of reachability sum rate is established. According to the power constraint condition, the two-objective optimization model is transformed into the single-objective optimization model. Then the Pareto optimization method is used to maximize the reachability rate and the corresponding low complexity algorithm is proposed. The simulation results show that the performance of D2D communication based on amplifying and forwarding relay is better than that of traditional D2D communication mode in the low signal-to-noise ratio region. Using Pareto power optimization method can further improve the system reachability and rate of D2D communication and cellular uplink and downlink.
【作者单位】：南京邮电大学江苏省无线通信重点实验室;
【基金】：国家科技重大专项基金(No.2011ZX03005-004-03) 国家“973”重点基础研究发展计划基金(No.2013CB329005) 国家自然科学基金(No.61171093) 江苏省优势学科建设项目基金(No.YX002001)资助
【分类号】：TN929.5

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