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针对两类基本的单中继模型,通过分析瑞利衰落环境下放大转发和译码转发协作单中继系统的性能,研究了在放大转发和译码转发两种模式下,中继位置对系统容量和性能的影响.仿真表明中继位置对系统性能起着关键作用.对于放大转发模式,当中继位于源节点和目的节点连线的中点时,系统性能最优;对于译码转发模式,根据不同参数配置,当中继位于源节点和目的节点连线的中点且靠近源节点时,性能最优.
Aiming at two basic types of single relay models, this paper analyzes the performance of the amplification-forwarding and decoding-forwarding cooperative single relay systems under Rayleigh fading environment. The effects of relay position on the system Capacity and performance.The simulation shows that the relay position plays a key role in the system performance.For the amplification and forwarding mode, when the relay is located at the midpoint between the source node and the destination node, the system performance is optimal. For the transcoding mode, According to different parameters, the best performance is obtained when the relay is located at the midpoint between the source node and the destination node and near the source node.