基于认知的协作系统中继分配算法

随着无线移动通信系统的飞速发展,无线通信网络能耗急剧增加,基于中继协作技术的绿色无线通信研究受到众多研究者的关注.针对基于认知的中继协作系统,提出了一种以最大主系统能效为目标的中继分配算法.该算法在不影响主系统性能基础上,对主系统请求次系统用户作为中继转发数据,且共享主用户频谱进行了简要介绍.算法中次系统通过最大权重匹配方法为主系统分配中继（次用户）,在满足主系统能效最大化的同时,实现了次系统与主系统的频谱共享.对算法进行仿真验证,提出的算法能获得较高的主系统能效,同时提高了整个系统的频谱利用率.

Cognitive-based Relay Assignment Algorithm in Cooperative Systems

With the development of wireless mobile communication systems, the energy consumption of wireless communication network is increasing dramatically. Green wireless communications research based on cooperative technologies attracts the attention of many researchers. For a cognitive-based cooperative network,this paper proposes a relay allocation algorithm for the target of maximum primary system energy efficiency. Secondary users can get an opportnnity to transmit their own data by forwarding primary user data without impacting the performance of the primary user,and the primary users share their own spectrum with secondary users as a reward for the secondary users. The secondary system assigns the optimal relay （ secondary users） for primary users by the maximum weight matching method. The algorithm not only maximizes the primary system energy efficiency, but also implements spectrum sharing between the secondary system and the primary system. The simulation results show that the proposed algorithm can obtain higher energy efficiency of the primary system and improve the spectral efficiency of the entire system at the same time.