Power Splitting-Based SWIPT with Dual-Hop DF Relaying in the Presence of a Direct Link



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Institute of Electrical and Electronics Engineers Inc.



This letter investigates the outage performance of dual-hop decode and forward relay systems in the presence of a direct link between the source and the destination, where simultaneous wireless information and power transfer is exploited at the relay by using a static/dynamic power splitting (PS) scheme. An analytical expression for the outage probability is derived to determine the optimal static PS ratio. Moreover, we study the dynamic PS scheme and derive a closed-form expression for the optimal dynamic PS ratio to minimize the outage probability at a given target rate. Furthermore, an analytical expression for the outage probability with the optimal dynamic PS ratio is also presented. It is shown that a full diversity gain can be achieved in the investigated system with static/dynamic PS scheme, and that the dynamic PS scheme outperforms the static PS scheme. ©2018 IEEE


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Outages, Electric power, Electric power systems--Reliability, Probabilities, Wireless communication systems, Information theory, Data transmission systems, Energy transfer


The work was supported in part by the National Key Research and Development Program of China under Grant 2016YFB1200202, in part by the Natural Science Foundation of Shaanxi Province under Grant 2017JZ022, and in part by the Natural Science Foundation of China under Grant 61771365.


©2018 IEEE