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

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.

Outage Performance of Wireless Powered Decode-and-Forward Relaying Networks in Rician Fading

“…In [ 13 ], the secrecy outage performance of a cooperative non-orthogonal multiple access (NOMA) network was investigated in Rayleigh fading, where the SWIPT was adopted. In [ 14 ], a battery-assisted SWIPT relaying system was studied in Rayleigh fading, which makes the system can work nomally when the collected energy is not sufficient. In [ 15 ], the outage probability of SWIPT AF relay network with cooperative spectrum sharing was analyzed in Rayleigh fading.…”

Outage Analysis of Relay-Assisted NOMA in Cooperative Cognitive Radio Networks with SWIPT

“…In addition, the improvement of the spectral sharing were widely studied in cognitive radio (CR) networks, where the secondary users can either access the licensed spectrum belonging to primary users without causing interference or opportunistically assist the data transmission of the primary users in exchange for the spectrum sharing [4,5]. In practice, simultaneous wireless information and power transfer (SWIPT) has emerged recently for low-power electronic devices, which can harvest energy and process the information from radio frequency (RF) signals concurrently [6,7].…”