On the Capacity of Full‐Duplex AF/DF Relay System with Energy Harvesting for Vehicle‐to‐Vehicle Communications

Abstract

This paper studies the ergodic capacity (EC) of full-duplex (FD) amplify-and-forward (AF) and decode-and-forward (DF) relay system with energy harvesting (EH) for vehicle-to-vehicle (V2V) communications. Unlike previous works on FD-EH systems, we consider the case that both relay and destination are mobile vehicles while the source is a static base station. We mathematically derive the exact closed-form expressions of ECs of both AF and DF protocols of the considered FD-EH-V2V relay system over cascade (double) Rayleigh fading. Our numerical results show that the ECs in the case of the V2V communication system are reduced compared to those in the case of stationary nodes. Also, with a specific value of residual self-interference (RSI), the ECs of the considered FD-EH-V2V relay system can be higher or lower than those of half-duplex- (HD-) EH-V2V system, depending on the average transmission power of the source. Furthermore, when the transmission power of the source and RSI are fixed, the ECs of the considered system can achieve peak values by using optimal EH time duration. On the other hand, the ECs of both AF and DF protocols reach the capacity floors in the high signal-to-noise ratio (SNR) regime due to the RSI impact. Also, the effect of RSI dominates the impact of cascade Rayleigh fading in the high SNR regime. Finally, we validate our analysis approach through Monte-Carlo simulations.

On the Error Performance of Relay-Assisted Vehicular Communication Systems

“…The integration of RF-EH capabilities with the V2V environment enables green communications as part of future communication systems, as well as sustainability and energy efficiency. Therefore, V2V-EH systems are considered in [29]- [32]. In [29], assuming an underlay CR network to improve security in the secondary transmitter's data link, a FD transmission is considered, while the secondary user (SU) adopts a PS L-EH model to generate jamming signals to reduce ASC in eavesdropper over cascaded κ − µ fading channels.…”

“…Finally, closed-form theoretical expressions of approximate and asymptotic OP are derived for SU. The ergodic capacity of the FD AF/DF relaying system considering L-EH in V2V communication is studied in [32]. The results show that the ergodic capacity is lower for the FD L-EH V2V communication system than for stationary nodes.…”

“…To the best of our knowledge, EH has not been extensively studied jointly for V2V networks. Generally, the papers in [29]- [32] investigate only the outage or ergodic performance of the V2V-EH systems and BER performance metric is not addressed in [29]- [32]. Moreover, [29]- [32] assume only the L-EH model with a single antenna, where some nodes are assumed to be static.…”

Coverage enhancements of vehicles users using mobile stations at 5G cellular networks

“…Different modeling techniques are used to achieving the high capacity for all users in dense erea for 5G Networks, one of these technigues is using mobile stations as studied in [13]. Although, the most related works discussed using the mobile station to enhance the received signal, they did not address the performance evaluation using the outage probability parameter [14]. The central contribution of this paper is proposing a new scenario to increase the bit rate and coverage for the passengers that use the vehicles based on install mobile staion (MS) on these vehicles to provide a high-quality service for user's mathematical analysis besides simulation are introduced in this paper.…”

“…The second is namely decode-and-forward (DF), which is encodes the signal before retransmission to its destination [15]. DF removes the noise that accompanies the original signal therefore, it is more complicated than AF [14], [16].…”