Abstract
In this paper, we evaluate the performance of a vehicle-to-vehicle (V2V) system where full-duplex relay (FDR) harvests the energy from source and uses decode-and-forward (DF) protocol to forward data from source to destination. Unlike existing works about FDR systems, we consider the scenario that both relay and destination are moving vehicles, leading to the channel between relay and destination characterized by double (cascade) Rayleigh fading. We successfully obtain the closed-form mathematical expressions of the outage probability (OP) and throughput of the considered energy harvesting- (EH-) FDR-V2V system. Based on these expressions, the system performance is investigated through various scenarios. Numerical results indicate that the performance of the considered system is reduced compared with that of the system over Rayleigh fading channels. We also observe that there is an optimal EH time duration that minimizes the OP and maximizes the throughput. This value depends on the transmission power of source. Furthermore, the OP goes to outage floor faster due to the impact of the residual self-interference (RSI), especially when RSI is high. All analysis results are verified by Monte-Carlo simulations.
Highlights
Energy harvesting (EH) has attracted great attention due to the advantages and applications of this technique in wireless sensors, microcontrollers, and displays [1,2,3,4]
We use the outage probability (OP) and throughput expressions obtained in the previous section to evaluate the performance of the considered energy harvesting- (EH-)full-duplex relay (FDR)-V2V system
Various scenarios are carried out to investigate the impacts of the double Rayleigh fading channels, the residual selfinterference (RSI), and the time switching ratio on the system performance
Summary
Energy harvesting (EH) has attracted great attention due to the advantages and applications of this technique in wireless sensors, microcontrollers, and displays [1,2,3,4]. Various works have investigated the performance of FDR-V2V systems via the mathematical expressions of OP and SEP [23, 24] and proposed several solutions such as antenna design [25] and interference management [26] to improve the performance of FDR-V2V systems These works indicated that in the case of V2V communications, the channels between vehicles are not the traditional channels such as Rayleigh, Nakagami, and Rician. The relay uses decode-and-forward (DF) protocol to forward data from source to destination (2) The exact closed-form expressions of OP and throughput of the considered EH-FDR-V2V system under the impact of both RSI and double Rayleigh fading channels are obtained.
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