Performance Analysis of Energy Harvesting-Based Full-Duplex Decode-and-Forward Vehicle-to-Vehicle Relay Networks with Nonorthogonal Multiple Access

Ba Cao Nguyen,Phuong T Tran,Tran Manh Hoang,Xuan Nghia Pham

doi:10.1155/2019/6097686

Abstract

In this paper, a combination of energy harvesting (EH) and cooperative nonorthogonal multiple access (NOMA) has been proposed for full-duplex (FD) relaying vehicle-to-vehicle (V2V) networks with two destination nodes over a Rayleigh fading channel. Different from previous studies, here both source and relay nodes are supplied with the energy from a power beacon (PB) via RF signals, and then use the harvested energy for transmitting the information. For the extensive performance analysis, the closed-form expressions for the performance indicators, including outage probability (OP) and ergodic capacity of both users, have been derived rigorously. Additionally, the effect of various parameters, such as EH time duration, residual self-interference (RSI) level, and power allocation coefficients, on the system performance has also been investigated. Furthermore, all mathematical analytical results are confirmed by Monte-Carlo simulations, which also demonstrate the optimal value of EH time duration to minimize the OP and maximize the ergodic capacity of the proposed system.

Highlights

Under the fast development of Internet of ings (IoT) devices and future wireless networks, e.g., the fth generation (5G) of mobile communications and numerous solutions to improve the spectrum e ciency have been proposed and experimented
The energy harvesting (EH)-FD-nonorthogonal multiple access (NOMA) system performance in terms of outage probability (OP) and ergodic capacity is plotted by using the expressions in eorem 1 and eorem 2
E system performance is evaluated for different values of the average SNR, where SNR is the ratio between the transmit power of power beacon (PB) and the variance of additive white Gaussian noise (AWGN), i.e., SNR P/σ2

Summary

Introduction

Under the fast development of Internet of ings (IoT) devices and future wireless networks, e.g., the fth generation (5G) of mobile communications and numerous solutions to improve the spectrum e ciency have been proposed and experimented. Erefore, EH is a promising solution for V2V networks Motivated by all these above facts, in this paper, we investigate an EH-FD-NOMA system, in which both source and relay nodes harvest energy from PB. After that, they utilize suitable circuits to transform the harvested energy to power for transmitting information. We assume that both the source node and the FD relay node, which is not any one of the receiving users, harvest the energy from the power beacon through RF signals. (ii) We derive the exact theoretical expressions for the system performance in terms of outage probability, throughput, and ergodic capacity of both users in the case of imperfect self-interference cancellation at the FD relay node over Rayleigh fading channel.

System Model

Performance Analysis

Numerical Results

Conclusion

Proof of Theorem 1