一种基于非正交信道的分布式中继选择及功率分配方法

针对非正交两跳多中继协作通信系统中的分布式中继选择问题,提出了一种基于非正交信道的中继选择准则,简化了系统的设计。分析了其误码率性能,给出了其解析表达式和以总功率为约束条件下的最优功率分配方案。仿真结果表明,最佳中继选择准则明显优于传统的中继选择准则,且在最优功率分配方案下,可以获得明显的分集增益,系统的误码率显著下降。

Distributed relay selection and power allocation based on non-orthogonal channel

A relay selection criteria is proposed based on non-orthogonal channel,in order to solve the problem of distributed relay selection in non-orthogonal two-hop multi-relay cooperative communication to predigest the system design. The system BER (Bit Error Rate) expression is obtained with its performance analysis, meanwhile, the optimal power allocation scheme is also proposed under the condition of total power restricted. Furthermore, computer simulations is conducted to show the BER performances of various cooperative relay selection criteria and power allocation schemes, conforming that the proposed cooperative relay selection criteria outperforms the traditional relay selection rules and the proposed transmission schemes can achieve the diversity gain with the BER decreased under the optimal power allocation schemes.