无线中继信道中继位置对信道容量影响的分析

Effect Analysis of the Relay Positions to Wireless Relay Channel Capacity

以最大化中继协作系统的信道容量为目标,研究了三节点无线中继信道中,中继节点位置对信道容量的影响。通过构造特定函数,给出了不同情况下信道容量的表达式,研究了信道容量最大时的最优中继位置。进行仿真,结果表明应用本文方法能准确有效地分析研究不同信道衰落参数下的信道容量和最优中继位置,且结论与直接求解信道容量计算公式时相同,并大大简化了运算复杂度。此外,该方法对其他准则下协作伙伴的选择具有指导意义。

As the target is maximizing the capacity of the three-node wireless relay channel,the effect of the relay positions is analyzed.A special mathematical equation is constructed.It provides the capacity formula in different conditions and gives out the optimal position of the relay node under the constraint of maximizing channel capacity.Simulation shows that this algorithm can represent channel capacity and the optimal position of relay node accurately and effectively.Furthermore,this method has meaning of guidance for cooperation partner selection in other criterions.