Outage Analysis of Wireless-Powered Relaying MIMO Systems with Non-Linear Energy Harvesters and Imperfect CSI
Outage Analysis of Wireless-Powered Relaying MIMO Systems with Non-Linear Energy Harvesters and Imperfect CSI
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DOI：
10.1109/access.2016.2617893
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发表时间：
2016-10
期刊：
影响因子：
3.9
通讯作者：
Jiliang Zhang;Gaofeng Pan
中科院分区：
文献类型：
--
作者：
Jiliang Zhang;Gaofeng Pan
本文研究了一个由多天线源节点（S）、多天线目的节点（D）和N（N>1）个单天线无线供电中继节点组成的无线供电双跳中继多输入多输出系统。在每个中继站，功率分配接收机被应用于处理接收到的信号以同时进行信息解码和能量收集，并且采用解码转发方案来转发处理后的信息。此外，假设每个中继器处的能量收集器是非线性的，具有饱和阈值以限制能量的功率水平。假设在S和D处都有不完全的信道状态信息，研究了在存在反馈时延的情况下，S采用发射天线选择，D采用最大比合并技术处理多个有信道估计误差的信号副本时的中断性能.考虑到第K个最佳中继选择标准，这将导致第K个最佳性能的中断概率的源中继目的链路，OP的解析表达式推导。蒙特卡罗模拟结果验证了推导的分析模型的准确性。
In this paper, we investigate a wireless-powered dual-hop relaying multiple-input multiple-output system, which consists of a multi-antenna source (S) node, a multi-antenna destination (D) node, and N(N>1) single-antenna wireless-powered relaying nodes. At each relay, a power splitting receiver is applied to process the received signal for information decoding and energy harvesting simultaneously, and a decode-and-forward scheme is adopted to forward the processed information. Furthermore, the energy harvester at each relay is assumed to be non-linear with a saturation threshold to limit the power level of the energy. Assuming imperfect channel state information is available both at S and D, outage performance is investigated when S adopts transmit antenna selection in the presence of feedback delay and D performs maximal ratio combining technique to deal with the multiple copies of signals with channel estimation errors. Taking into account a K th best relay selection criterion, which results in the K th best performance in terms of outage probability for the source-relay-destination link, an analytical expression for OP is derived. Monte Carlo simulation results are presented to verify the accuracy of the derived analytical model.