一种联合中继节点选择的博弈功率控制算法

有效的资源分配在协同通信中占有举足轻重的地位，鉴于此，该文研究了其中的中继节点选择和功率控制问题，提出了一种联合中继节点选择的博弈功率控制算法。它的主要思想是从各节点信噪比的角度建立收益函数，并具体针对源节点和中继节点建立不同的代价函数。在认为每个节点都负责的前提下，通过调整各节点功率达到各自效用的最大化，并依据中继节点发送功率的策略空间，优化参与协同的中继节点集合。同时，该文还对纳什均衡的性能进行了数学分析。从仿真结果可以看出，所提算法在复杂度可接受的前提下，能使各节点间的功率得到合理有效的使用，确能改善系统性能。

A Game-theoretical Power Control Algorithm with Relay Selection

The performance in cooperative communication depends much on efficient resource allocation such as relay selection and power control. In this paper, a game-theoretical power control algorithm with relay selection is proposed. A payoff function is defined according to each node’s SNR, and there are different pricing scheme between the source node and the relay nodes, because they play different roles in the networks. On the premise that these nodes are responsible, the goal is to maximize the utility function by adjusting the power. Then a choice among the relay nodes is maked, according to the power criterion. Furthermore, the property of the Nash equilibrium is analyzed . Simulation results show that the algorithm can encourage the nodes to employ their power efficiently, and improve the performances of the systems.