摘要
多节点大规模网络的中继传输存在额外干扰.为此,文中基于干扰模型提出一种联合功率控制的中继选择策略,即通过定义干扰系数和为中继节点建立干扰列表,在每次迭代中选取干扰系数最大的中继来进行功率调整,从而获得容量最大的无干扰中继.仿真结果表明:相比不考虑干扰的中继选择策略及避免干扰的用户协商中继选择策略,联合功率控制的中继选择策略能获得更大的网络容量;干扰的影响越大,文中提出的策略的作用越明显.
In order to eliminate extra interferences during the relay transmission in large-scale wireless networks,a combined relay selection and power control algorithm is proposed based on the interference model.In this algorithm,with the help of the defined interference coefficient and the interference list for the relay node,the relay with the maximum interference coefficient is selected to adjust the power of the relay in each iteration.Thus,a noninterference relay with the largest capacity is obtained.Simulated results indicate that,as compared with the relay selection algorithm without interference consideration or with interference avoidance,the proposed algorithm possesses larger network capacity and is more effective when there is serious interference.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第12期20-24,31,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(61001113)
关键词
协作通信
中继选择
功率控制
干扰避免
cooperative communication
relay selection
power control
interference avoidance
