计算机工程Issue(5)：93-96,101,5.DOI:10.3969/j.issn.1000-3428.2015.05.016
中继协作认知无线电系统的最优化功率分配
Optimal Power Allocation in Relay Cooperative Cognitive Radio System
王仕果 1易进 1彭海霞1
作者信息
- 1. 湘潭大学信息工程学院，湖南 湘潭411105
- 折叠
摘要
Abstract
Combining relay cooperation with Cognitive Radio( CR) technology is one of the effective ways to improve the utilize efficiency of spectrum resources and reduce power consumption. In the context of no direct link between cognitive users’ ends,relay’ s working in Amplify-and-Forward( AF) mode,and limitation of cognitive users and relay’ s transmitted power,this paper discusses the power allocation in relay cooperative CR systems. Adopting KKT condition and sub-gradient method to solve the optimization problem, an optimal power allocation algorithm is proposed. This algorithm not only can ensure authorized users’ average communication quality and worst communication quality are not affected,but also can maximize cognitive users’ communication capacity. Meanwhile,in the Rayleigh fading channel, numerical simulation of the proposed algorithm verifies itself further.关键词
认知无线电/中继协同通信/功率分配/凸优化/对偶分解法/次梯度法/KKT条件Key words
Cognitive Radio (CR)/relay cooperative communication/power allocation/convex optimization/dual decomposition method/sub-gradient method/KKT condition分类
信息技术与安全科学引用本文复制引用
王仕果,易进,彭海霞..中继协作认知无线电系统的最优化功率分配[J].计算机工程,2015,(5):93-96,101,5.
