中文摘要：

在多源-多宿-多中继-多载波的协作无线通信网络中,最优联合中继选择与认知频谱接入是一个NP问题。本文基于遗传算法设计了一种高效、低复杂度的联合中继选择与认知频谱接入机制。仿真结果表明该机制可以快速收敛到准全局最优值,对应的系统容量和超过全局最优的98.5%。

英文摘要：

The paper focused on jointly optimal relay selection and cognitive spectrum access in cooperative wireless networks with multiple source nodes,multiple destination nodes,multiple poten-tial relay nodes and multiple sub-channels. The problem can be proven to be NP-HARD. Based on the genetic algorithm,we have designed a low-computational-complexity scheme of joint relay selection and cognitive spectrum access. Simulation results indicate that,the scheme converges very fast in prac-tice with achievable sum-capacity on average higher than 98.5%of the global optimum.