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首页> 外文期刊>Signal Processing, IET >Relay selection schemes to minimise outage in wireless powered communication networks
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Relay selection schemes to minimise outage in wireless powered communication networks

机译：中继选择方案可最大程度地减少无线通信网络中的中断

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摘要

In this study, the authors discuss relay selection schemes with the objective to minimise outage probability for a network consisting of a single source, multiple relays and a single destination. The relays are powered by radio frequency signals from the source. For a successful transmission, at least one of the relay nodes should be able to decode the source signals and have enough energy to relay the information to the destination. The authors assume that a relay node cannot decode information and harvest energy from the source signals simultaneously. The authors formulate an optimisation problem to minimise outage probability for the system. The relay selection scheme and the outage performance depend on the availability of the channel state information (CSI) on the source-relay and the relay-destination links. Based on the availability of the CSI on the relay-destination link, the authors propose relay selection schemes for different scenarios and evaluate the performance numerically. The results show that the availability of the CSI on the relay-destination link at the relay node helps to improve the outage performance considerably. The authors characterise the outage probability for the schemes analytically; and numerically compute the optimal number of relays which provide the optimal outage performance for a given scheme.
机译：在这项研究中，作者讨论了中继选择方案，目的是最大程度地减少由单个源，多个中继和单个目标组成的网络的中断概率。继电器由来自电源的射频信号供电。为了成功传输，至少一个中继节点应该能够对源信号进行解码，并具有足够的能量将信息中继到目的地。作者假设中继节点无法同时解码信息并从源信号中获取能量。作者提出了一个优化问题，以最大程度地减少系统的停机可能性。中继选择方案和中断性能取决于源中继和中继目标链路上信道状态信息（CSI）的可用性。基于CSI在中继站目标链接上的可用性，作者提出了针对不同场景的中继站选择方案，并对性能进行了数值评估。结果表明，中继节点上的中继目标链路上的CSI可用性有助于显着提高中断性能。作者通过分析描述了方案的中断概率。并通过数值计算最佳继电器数量，从而为给定方案提供最佳停机性能。

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