Wireless Information and Power Transfer in Relay Systems With Multiple Antennas and Interference

Abstract

In this paper, an energy harvesting dual-hop relaying system without/with the presence of co-channel interference (CCI) is investigated. Specifically, the energy constrained mutliantenna relay node is powered by either the information signal of the source or via the signal receiving from both the source and interferer. In particular, we first study the outage probability and ergodic capacity of an interference free system, and then extend the analysis to an interfering environment. To exploit the benefit of multiple antennas, three different linear processing schemes are investigated, namely, 1) Maximum ratio combining/maximal ratio transmission (MRC/MRT), 2) Zero-forcing/MRT (ZF/MRT) and 3) Minimum mean-square error/MRT (MMSE/MRT). For all schemes, both the systems outage probability and ergodic capacity are studied, and the achievable diversity order is also presented. In addition, the optimal power splitting ratio minimizing the outage probability is characterized. Our results show that the implementation of multiple antennas increases the energy harvesting capability, hence, significantly improves the systems performance. Moreover, it is demonstrated that the CCI could be potentially exploited to substantially boost the performance, while the choice of a linear processing scheme plays a critical role in determining how much gain could be extracted from the CCI.Index Terms-Dual-hop relay channel, wireless power transfer, co-channel interference, linear multiple-antenna processing, performance analysis.

Outage Probability Analysis in Power-Beacon Assisted Energy Harvesting Cognitive Relay Wireless Networks

“…Throughput analysis of amplifyand-forward (AF) and decode-and-forward (DF) relaying systems was performed in [11] and [9], [12], respectively. In addition, several aspects associated with EH relay systems 2 Wireless Communications and Mobile Computing have been examined, including EH-based relaying networks in the presence of interference [13], EH-based cooperative systems with spatially random relays [14], relay selection for trade-off between quality of information transfer and average transferred energy [15], and two-way EH-based relay systems [16].…”

Secrecy Performance of Wirelessly Powered Wiretap Channels

“…This is not surprising since the MRT scheme has access to perfect CSI of h M , while TAS scheme only utilizes partial knowledge of h M . Recall in the conventional wirelessly powered system without secrecy constraint, the outage probability decays in a much slower speed, i.e., ρ −N ln ρ instead of ρ −N due to the randomness of the transmit power, where N is the number of antennas, and ρ is the SNR [32], [33]. In the current work, we notice that the randomness of the transmit power does not affect the scaling behavior of the secrecy outage probability.…”

RF energy harvesting: an analysis of wireless sensor networks for reliable communication

“…In the light of RF energy harvesting ideas, many researchers have investigated on the problems of simultaneous information transmission and WPT in order to improve reliable communication, accordingly theoretical models, protocols, and system designs, have been proposed [17][18][19][20][21][22][23][24][25][26][27][28]. Specifically, in [17], an outage minimization with energy harvesting for point-to-point communication over fading channels has been studied.…”