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.

中文翻译：

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能量收集全双工解码转发的车辆到车辆中继系统的中断概率和吞吐量分析

在本文中，我们评估了车对车（V2V）系统的性能，其中全双工中继（FDR）从源头获取能量，并使用解码转发（DF）协议将数据从源头转发到目的地。与现有的有关FDR系统的工作不同，我们考虑中继站和目标站都在移动车辆的情况，从而导致中继站和目标站之间的信道具有双（级联）瑞利衰落的特征。我们成功地获得了所考虑的能量收集-（EH-）FDR-V2V系统的中断概率（OP）和吞吐量的闭式数学表达式。基于这些表达式，可以通过各种方案研究系统性能。数值结果表明，与瑞利衰落信道上的系统相比，该系统的性能有所下降。我们还观察到，有一个最佳的EH持续时间可以最大程度地减少OP并最大化吞吐量。该值取决于信号源的发射功率。此外，由于残留自干扰（RSI）的影响，OP更快地到达停机层，尤其是在RSI高时。所有分析结果均由Monte-Carlo仿真验证。