Abstract
Energy harvesting is a technique to harvest energy from RF (radio frequency) waves. The RF signals have the ability to convey energy and information concurrently. The EH in coop-erative relaying systems may increase the capacity and coverage of wireless networks. In this work, we study a dual-hop (two-hop) relaying. This system has three nodes: a source, a relay, and a destination. The source and destination have multiple antennas. We account a non-linear EH model and TSR (time-switching-based relaying) protocol at the single-antenna relay node. We evaluate the system performance over η−µ fading channels. With a saturation threshold, a non-linear EH receiver restrains the harvested power. In the TSR protocol, the relay changes mode between the EH and information processing, by which a fraction of time is used with each process. The fading model η−µ incorporates some fading models as notable cases, viz., Nakagami- m, One-sided Gaussian, Nakagami-q (Hoyt), and Rayleigh. The system performance is analyzed in terms of the average capacity and throughput for different saturation threshold power levels, divers antennas arrangements, and different parameter values of η and µ.
Highlights
Energy harvesting (EH) is a technology to gather energy from the surrounding radio frequency (RF) waves and got outstanding recognition to sustain a network lifetime [1]– [14]
The remaining sections of our paper are sectioned as follows: In Section II, firstly, we give a brief introduction of the considered system model and we describe the η − μ channel model and its particular cases; in Section III, performance analysis of the assumed system is provided; the identical and non-identical fading cases which are obtained from the η − μ fading scenario are discussed in Section IV; in Section V, based on the obtained expressions, the numerical as well simulated results are given; in the last section, the conclusion of our paper is concluded
The throughput increases as time-switching ratio, α, grows from 0 to α∗, and the value of the throughput lowers as α grows from the optimal-value α∗ to 1
Summary
Energy harvesting (EH) is a technology to gather energy from the surrounding radio frequency (RF) waves and got outstanding recognition to sustain a network lifetime [1]– [14]. The performance of a two-hop DF EH relaying network based on a non-linear mode of EH receiver was investigated for classical fading channels in [6]–[12] and for general κ − μ shadowed and η − μ fading channels, respectively, in [6] and [13]. In [11], the authors investigated the secrecy performance for a two-hop DF relaying with a non-linear energy harvester In this system, the best relay is selected using CSI (channel state information) which assists the source to send its message signal to the destination. A non-linear EH relay receiver in conjunction with the energy harvesting PSR protocol in a two-hop EH relaying for η − μ fading channels was examined in a delay-limited transmission mode [13]. The remaining sections of our paper are sectioned as follows: In Section II, firstly, we give a brief introduction of the considered system model and we describe the η − μ channel model and its particular cases; in Section III, performance analysis of the assumed system is provided; the identical and non-identical fading cases which are obtained from the η − μ fading scenario are discussed in Section IV; in Section V, based on the obtained expressions, the numerical as well simulated results are given; in the last section, the conclusion of our paper is concluded
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