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An efficient time-switching relaying protocol for multiuser cognitive radio relay networks with SWIPT

机译：具有SWIPT的多用户认知无线电中继网络的有效时间切换中继协议

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摘要

In this paper, we propose a new time-switching relaying (TSR) protocol for multi-destination dual-hop underlay cognitive radio relay networks with simultaneous wireless information and power transfer (SWIPT) technique. The proposed protocol maintains the same receiver complexity of the conventional TSR protocol with the ability for implementing both of them using the same hardware. We study the performance of the proposed TSR protocol and compare it with the conventional TSR and power-splitting relaying (PSR) protocols. Unified analytical expression is derived for the outage probability, in addition to studying the performance at high signal-to-noise ratio (SNR) values where unified approximate and simple expressions for the outage probability are provided. The results show that the proposed TSR protocol outperforms the conventional TSR protocol in terms of outage probability. Also, findings illustrate that applying the SWIPT technique in multi-destination underlay cognitive relay networks results in a unity diversity order. In contrast to conventional relaying networks, results show that the best location for the relay node in SWIPT relay networks is either near the source or the destinations, but not in between.
机译：在本文中，我们提出了一种用于多目标双跳底层认知无线电中继网络的新的时间交换中继（TSR）协议，该协议具有同时进行的无线信息和功率传输（SWIPT）技术。所提出的协议保持了与常规TSR协议相同的接收器复杂性，并具有使用相同硬件来实现它们的能力。我们研究了提出的TSR协议的性能，并将其与常规的TSR和功率分流中继（PSR）协议进行了比较。除了研究高信噪比（SNR）值下的性能外，还为中断概率导出了统一的分析表达式，其中提供了中断概率的统一近似和简单表达式。结果表明，提出的TSR协议在中断概率方面优于传统的TSR协议。此外，研究结果表明，将SWIPT技术应用于多目标基础认知中继网络会导致单位多样性。与传统的中继网络相比，结果表明SWIPT中继网络中中继节点的最佳位置是靠近源或目的地，而不是位于两者之间。

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