Performance Enhancement for Full-Duplex Relaying with Time-Switching-Based SWIPT in Wireless Sensors Networks
Abstract
:1. Introduction
- We propose a SIMO system model in which a two-antenna FD relay node can harvest energy from RF signals of a single-antenna source and then use the harvested energy to transfer information to a multi-antenna destination. Specifically, the destination can adopt SC or MRC to decode the received information.
- Both static TS factor (STSF)- and optimal dynamic TS factor (ODTSF)-based methods are investigated in our work. Especially in ODTSF methods, we derive the exact closed form of optimal dynamic TS factor for maximizing the total throughput obtained at the destination.
- To fully investigate the system performance, we propose four protocols, namely static time-switching factor with selection combining (STSF-SC), static time-switching factor with maximal ratio combing (STSF-MRC), optimal dynamic time-switching factor with selection combining (ODTSF-SC), and optimal dynamic time-switching factor with maximal ratio combing (ODTSF-MRC).
- Monte Carlo simulations are performed to corroborate the effectiveness of our proposed methods. Specifically, the results show that ODTSF-MRC always outperforms other schemes in terms of outage probability.
2. System Model
2.1. Energy Harvesting and Information Transmission
2.1.1. Case 1: Selection Combining (SC) Is Adopted at the Destination
2.1.2. Case 2: Maximal Ratio Combining (MRC) Is Adopted at the Destination
3. Outage Probability (OP) Analysis
3.1. Case 1: Static Time-Switching Factor (STSF)
3.1.1. With SC
3.1.2. With MRC
3.2. Case 2: Optimal Dynamic Time-Switching Factor (ODTSF)
3.2.1. With SC
3.2.2. With MRC
4. Simulation Results
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Symbol | Parameter Name | Fixed Value | Varying Range |
---|---|---|---|
SNR threshold of the system | 1 | 0.5 to 8 | |
Energy harvesting efficiency | 0.8 | none | |
Time-switching factor | 0.05–0.95 | 0.05 to 0.95 | |
Distance between source S and relay R | 1 | none | |
Distance between relay R and destination D | 0.5 | none | |
Rate parameter of | 1 | none | |
Rate parameter of | 0.5 | none | |
Rate parameter of | 5 | none | |
Transmit-power-to-noise-ratio | 5 dB | −5 to 15 (dB) | |
M | No. of antennas at the destination | 2; 3 | 1 to 10 |
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Tin, P.T.; Nguyen, T.N.; Tran, D.-H.; Voznak, M.; Phan, V.-D.; Chatzinotas, S. Performance Enhancement for Full-Duplex Relaying with Time-Switching-Based SWIPT in Wireless Sensors Networks. Sensors 2021, 21, 3847. https://doi.org/10.3390/s21113847
Tin PT, Nguyen TN, Tran D-H, Voznak M, Phan V-D, Chatzinotas S. Performance Enhancement for Full-Duplex Relaying with Time-Switching-Based SWIPT in Wireless Sensors Networks. Sensors. 2021; 21(11):3847. https://doi.org/10.3390/s21113847
Chicago/Turabian StyleTin, Phu Tran, Tan N. Nguyen, Dinh-Hieu Tran, Miroslav Voznak, Van-Duc Phan, and Symeon Chatzinotas. 2021. "Performance Enhancement for Full-Duplex Relaying with Time-Switching-Based SWIPT in Wireless Sensors Networks" Sensors 21, no. 11: 3847. https://doi.org/10.3390/s21113847