几种协作分集模式能量消耗比较

Comparison of energy consumption for several cooperative diversity modes

为了提高通信性能和延长无线网络生命周期,提出了统一的系统模型;分析了选择译码转发(SDF)和多输入多输出(MIMO)协作工作模式,研究了影响能耗的几个因素。研究表明,对于同一平均误比特率值,SDF系统比单输入单输出(SISO)系统的能量消耗低;当发射节点数目固定时,MIMO协作方式接收节点不是越多越好,而是存在一个最佳数目。短距离时,协作MIMO系统比传统SISO系统的比特能耗高。大于临界距离时,协作MIMO系统才能节省能量。

In order to improve the communicating performance and extend the life cycle of wireless networks,this paper set up a unified model,analyzed the cooperative modes of selective decoding forward（SDF） and multiple input multiple output（MIMO）,and investigated the factors which affected energy consumption.The research results indicate that the energy consumption of the SDF system is lower than that of the single input single output（SISO） system for a fixed ABER value.When the number of transmitting nodes is fixed,required an optimal number of receiving nodes is for the lowest energy consumption.The energy consumption of MIMO system is higher than that of traditional SISO for a short distance.The energy consumption can only be saved unless the distance is longer than the critical value.