【摘要】 文章考虑了认知无线网络中次用户复用主用户信道并利用中继节点转发信息时中继节点的功率分配问题。为防止窃听节点通过窃听中继节点的转发信号来窃取次用户的信息,文章给出一种通过合理安排中继节点分配给各个次用户发送功率的方案,其目的是使得整个网络中所有次用户的安全速率之和能够达到最大。在这一目标下,结合认知网络的多层次特性,文章引入斯塔克尔伯格博弈对问题进行建模,并设计了半分布式的功率分配算法。仿真结果表明,利用文章所提算法得到的最终功率分配方案有着较好的性能,且能够随着用户的移动时刻调整中继节点的功率分配方案。更多还原

【Abstract】 This paper focuses on the power allocation of the relay where some secondary users reuse the channels of the primary user with the help of the relay.In the network,an eavesdropper eavesdrops the signal from the relay to obtain the information of the secondary users.This work means to maximize the sum security rate of all the secondary users by allocating the power of the relay properly.With such a target,the Stackelberg game was introduced to model the problem on the power allocation of the relay according to the multi-level feature of the network.A semi-distributed power allocation algorithm was designed.The simulation results show that with this proposed algorithm,the final power allocation scheme works well.And the relay can adjust the power allocation scheme with the secondary users moving in real time.更多还原