最小功耗的中继选择与功率分配的联合优化

Joint power allocation and relay selection strategies based on minimizing power consumption for relay networks

摘要:

研究采用放大转发协议的单向和双向中继网络中的中继选择与功率分配的联合优化策略。该策略以一定服务质量(QoS)要求为约束条件，以最小化中继网络中各节点的总功率为目标，建立优化问题。运用凸优化技术，得到了该优化问题的闭合解。仿真结果表明在满足相同的QoS要求下，该最优联合策略较传统的随机选择与等功率分配策略具有较低的功率消耗。

Abstract:

This paper investigates several joint power allocation and relay selection strategies for wireless cooperative networks with Amplify-and-Forward(AF) protocols. These strategies aim at minimizing the total power consumption subject to some given Quality of Service(QoS)，which can be formulated to convex optimization problems. Using standard convex optimization techniques，closed-form solutions to these problems are obtained. Simulation results show that the proposed strategies can achieve lower power consumption than the traditional random relay selection and equal power allocation strategy.