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On the Performance of Battery-Assisted PS-SWIPT Enabled DF Relaying

Shaanxi Key Laboratory of Information Communication Network and Security, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
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Information 2020, 11(3), 165; https://doi.org/10.3390/info11030165
Received: 1 February 2020 / Revised: 2 March 2020 / Accepted: 10 March 2020 / Published: 20 March 2020
(This article belongs to the Section Information and Communications Technology)
Compared with the conventional simultaneous wireless information and power transfer (SWIPT) based relaying with “harvest-then-forward” protocol, the battery-assisted SWIPT relaying is more practical and powerful due to the joint use of the harvested energy and supplementary battery. However, to the best of our knowledge, the performance of a battery-assisted power splitting (PS)-SWIPT decode-and-forward (DF) relay system has not been studied. In this paper, for a given amount of energy from the relay’s battery, we propose to maximize the outage and ergodic capacities by optimizing the static and dynamic PS ratios that rely on statistical and instantaneous channel state information (CSI), respectively, and derive their corresponding outage and ergodic capacities. Computer simulations validate our analytical results and demonstrate the advantages of the dynamic PS over the static PS in terms of the outage and ergodic capacities, as well as the energy efficiency. View Full-Text
Keywords: decode-and-forward relay; SWIPT; power splitting; energy harvesting; battery; outage; ergodic capacity decode-and-forward relay; SWIPT; power splitting; energy harvesting; battery; outage; ergodic capacity
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Liu, Z.; Lu, G.; Ye, Y.; Shi, L. On the Performance of Battery-Assisted PS-SWIPT Enabled DF Relaying. Information 2020, 11, 165.

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