In this paper, we investigate the performance for a mixed dual-hop free space optical-underwater wireless optical communication (FSO-UWOC) system, in which a source transmits information to a destination through a multi-aperture relay. In addition, a selection combining and a transmitting aperture select- ion protocols are adopted at the relay to process the received and transmitted signals. Considering two different types of detection techniques, and a decode-and-forward scheme, the analytical expressions for the average bit error rate are derived based on the Meijer’s G-function and Fox’s H-function for the considered system over Gamma-Gamma and mixture Exponential-Generalized Gamma fading channels. In addition, the accuracy of the derived analytical expressions is verified with Monte-Carlo simulation results.
KEYWORDS: Wireless communications, Signal to noise ratio, Relays, Picosecond phenomena, Telecommunications, Engineering, Electronics engineering, Simulations, Data transmission, Wireless energy transfer
In this article, we evaluate the outage performance for a wireless-powered relaying radio frequency-underwater wireless optical communication (RF-UWOC) network with an amplify-and-forward protocol. Specifically, a source transmits an RF signal to a power-constrained offshore relay, which first adopts a power-splitting protocol to harmonize the information encoding and energy collecting of the received signal and then converts it to an optical one and utilizes the harvested energy to broadcast it to the destination. Assuming the RF and UWOC links undergo Nakagami-m distribution and a mixture Exponential-Gamma distribution, the analytical expression for the outage probability is deduced. Moreover, the rightness of the analysis is validated by Monte-Carlo simulations.
KEYWORDS: Satellites, Relays, Systems modeling, Monte Carlo methods, Antennas, Wireless communications, Telecommunications, Satellite communications, Reliability
In this paper, the outage performance for a full-duplex (FD) relaying satellite-terrestrial system is investigated. The system consists of a satellite source, a relay, and two users. Firstly, the satellite transmits the information of two users to the FD relay, and then the relay decodes and forwards the information to both users. Herein, the non-orthogonal multiple access protocol is used to incorporate the signal of two users. We investigate the system outage performance in the presence of residual self-interference of the relay and derive the exact expressions of outage probability for two users. Moreover, the accuracy of the results is verified with Monte-Carlo simulations.
We investigate the physical-layer security performance for a wireless-powered relaying mixed free-space optical-radio frequency (FSO-RF) system. In this system, a source transmits optical information to a relay (R), which decodes the received signal with a decode-and-forward protocol, converts it into an RF signal, and forwards it to a destination in the presence of an eavesdropper. Furthermore, we also assume that R has no extra power supply, and it only relies on harvesting energy from a power beacon to forward the information. Assuming that the FSO and all of the RF channels experience gamma-gamma and Rayleigh fading, the closed-form analytical expressions for secrecy outage probability and the probability of strictly positive secrecy capacity are derived. In addition, the effects of atmospheric turbulence, pointing errors, and detection techniques on the system performance are analyzed. Finally, we perform Monte Carlo simulations to verify the accuracy of the derived expressions.
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