Year-end Sale % OFF 
Abstract
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.
Highlights
Wireless relaying is considered as a privileged means to enhance the spectral efficiency and extend the coverage of communication networks [1,2]
While it has been shown that the system performance can be further enhanced by using a dynamic power splitting (PS) ratio that can be adjusted based on the instantaneous channel state information (CSI)
We study the performance of a battery-assisted simultaneous wireless information and power transfer (SWIPT) DF relaying, where both the static and dynamic PS ratios are considered
Summary
Wireless relaying is considered as a privileged means to enhance the spectral efficiency and extend the coverage of communication networks [1,2]. For the SWIPT based relay system, most existing works were based on the “harvest--forward” protocol, i.e., the transmit power of a relay only relies on the harvested energy, and various TS/PS schemes were proposed to improve the outage/ergodic capacity the performance (see [6,7,8,9,10,11,12,13] and reference therein). While it has been shown that the system performance can be further enhanced by using a dynamic PS ratio that can be adjusted based on the instantaneous CSI instead of the static one [8,11], the performance gain in battery-assisted SWIPT relay systems is not known yet. We study the performance of a battery-assisted SWIPT DF relaying, where both the static and dynamic PS ratios are considered. We compare the achievable energy efficiency between the static and dynamic PS schemes and show how the assisted energy Eb affects on the energy efficiency
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
