摘要
在研究已有的放大转发（AF）和解码转发（DF）这两种中继模式的基础上，根据估计转发（EF）的思想，提出了一种对软符号和相应噪声功率估值的新型EF无线中继模式，并设计了基于联立求解方程组来实现这种中继模式的简化算法。分析了这种EF模式相比于已有模式的特点和优势。在仿真实验中分别设定了两种协作场景，对上述3种转发模式的性能进行了比较。仿真结果表明，软符号的EF机制在误比特率和误帧率性能方面都优于传统的AF模式和DF模式，获得了较为显著的增益。
On the basis of the research on two existing relaying modes of amplify-and-forward （AF） and decode-and-forward （DF） for wireless relay networks, this paper proposes a new relay scheme based on estimating soft symbols and the corresponding noise variance according to the concept of estimate-and-forward （EF）, and gives a simplified algorithm for implementation of the relay scheme gased on establishing and solving a linear equation group. The features and advantages of this novel relaying mode are analyzed and compared with the existing modes. Finally, the simulations of the three modes＇ comparison in two cooperative scenarios are provided. As the results shown, the proposed EF relay scheme outperforms other modes in terms of the bit error rate （BER） and the frame error rate （FER）, according to which, and the gain performance is improved significantly.
出处
《高技术通讯》
CAS
CSCD
北大核心
2011年第5期482-487,共6页
Chinese High Technology Letters
基金
863计划（2007AA01Z261）,国家自然科学基金（60702051）,教育部博士点基金新教师项目（20070013028）和新世纪优秀人才支持计划（NCET-08-0735）项目资助.
