一种多中继协作系统中的功率分配算法

提出了多中继无线通信系统的模型,研究其源节点和各中继节点间功率分配对系统容量的影响,在总功率一定的情况下,探讨了以容量最大化为准则的功率分配算法。对采用非再生协作中继方式的多中继协作通信系统进行了容量分析,并提出了一种低复杂度的最优功率分配算法(Optimum Power Allocation,OPA)。仿真结果表明,该算法相对于平均功率分配算法(Average Power Allocation,APA),系统容量得到了显著提高,在信道条件差的情况下,性能提高更明显。

A Power Allocation Algorithm in Multi-relay Cooperative Communication Systems

A multi-relay wireless communication system model is proposed,in which to get the effects of power allocation between the source node and each relay node on the system capacity,the power allocation algorithms with a total power constraint are discussed to maximize the system capacity.By analyzing the capacity of multi-relay cooperative communication systems with non-regenerative cooperative relay mode,we propose an optimum power allocation algorithm with low computational complexity.The results of simulation show that,compared with the average power allocation algorithm （APA）,the proposed algorithm increases the system capacity significantly.In the case of poor channel conditions,the performance improvement is more evident.