Abstract
In this paper, we investigated the performance of a two-way satellite-terrestrial DF relay network with asymmetric simultaneous wireless information and power transfer (SWIPT). In particular, selective physical-layer network coding (SPNC) was employed in the proposed network, improving the throughput performance. We derived the expressions of system average end-to-end throughput and single node detection (SND) occurrence probability. Furthermore, to observe the effects of the power splitting (PS) coefficient on the energy efficiency performance, the expressions of energy harvested in the physical-layer network coding (PNC) and SPNC protocol were also derived. Finally, theoretical analyses and Monte Carlo simulation results are presented to show: (i) SPNC protocol outperforms the conventional PNC protocol in the two-way satellite-terrestrial relay network with SWIPT in infrequent light shadowing (ILS), average shadowing (AS), and frequent heavy shadowing (FHS) Shadowed-Rician fading channels; (ii) as the channel state gets worse, SPNC protocol can achieve more performance improvement than PNC protocol; (iii) as the PS coefficient increases, the average end-to-end throughput performance increases progressively, and the average energy efficiency performance increases progressively within a certain range, while decreasing in the others.
Highlights
The power splitting (PS) coefficient ρ is 0.5, which means 0.5 portion of the received signal in the user source node is used for information decoding, and the remaining 0.5 portion of the received signal is harvested
The average end-to-end throughput performance in the average shadowing (AS) case significantly increases as the PS coefficients ρ increase from 0.4 to 0.5 and 0.6
We have investigated the performance of the two-way satellite-terrestrial relay network with simultaneous wireless information and power transfer (SWIPT), where both selective physical-layer network coding (SPNC) and physical-layer network coding (PNC) protocols have been considered in the system
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. PNC protocol in throughput performance over Rayleigh fading channel, where the XOR operation is replaced by single node detection during the second time slot of conventional. The performance of a distributed space-time coding-based hybrid satellite-terrestrial cooperative system with a single fixed terrestrial relay was investigated. The author proposed SWIPT in [13], where the receiver simultaneously executes information decoding and energy harvesting. We propose the framework of the SWIPT aided two-way satellite-terrestrial relay network model and introduce the SPNC protocol to improve the throughput performance of the proposed network. The rest of this paper is organized as follows: In Section 2, the SWIPT aided twoway satellite-terrestrial relay network model is presented, and a brief introduction to SPNC protocol is given.
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