In this paper, we consider the secrecy outage probability (SOP) of a cooperative non-orthogonal multiple access (NOMA) vehicular communication (VC) system, where the relay is working in either halfduplex (HD) or full-duplex (FD) mode. We assume that all these links experience Nakagami-m fading. Some closed-form analytical expressions for the SOP performance of the FD/HD cooperative NOMA-VC system are derived. Results show that the secrecy performance of FD-based NOMA-VC system is superior than HD-based NOMA-VC in the low signal noise ratio (SNR) region, and can be further improved by reducing the self-interference caused by FD technique. Finally, the validity of this analytical expressions is verified by using simulation. The simulation results show that the simulation curve can be fit well with our analytical results. INDEX TERMS Physical layer security, non-orthogonal multiple access, cooperative communications, full/half duplex relaying, vehicular communication. PENG ZHU was born in Yueyang, Hunan, China, in 1990. He received the Ph.D. degree in space physics from Wuhan University. Since 2016, he has been a Lecturer with HNIST. His major research interests include signal processing and communication techniques. XINZHONG LIU was born in 1978. He received the Ph.D. degree. His main research interests include software reliability analysis, computer communication security, and heterogeneous parallel computing.
High-speed railway (HSR) wireless communications are required to ensure strict security. In this work, we study the secrecy performance of a nonorthogonal multiple access- (NOMA-) aided HSR wireless communication system in the case of an eavesdropping user. Specifically, applying NOMA technology to the HSR communication system can effectively improve the data rates. Therefore, we study the secrecy performance of the downlink NOMA system under the HSR wireless communication. In particular, the exact analytical results for the secrecy outage probability (SOP) based on no small-scale channel state information (CSI) are derived. We also provide all of the parameterizations for the proposed channel model. Finally, the correctness of theoretical derivation is verified via simulations. Results show the positive effect of utilizing the NOMA for enhancing wireless systems secrecy performance.
In this work, the authors consider the security performance for the mixed radio frequency link and visible-light link cooperative relaying system, where the relay has the energy collection ability and can extract the direct current part existing in the visible-light signal. Then, the relay uses the collected energy to demodulate the received visible-light signal and retransmit it through the radio frequency link. With this equipment, some analytical expressions of the average secrecy capacity and the secrecy outage probability are derived. Furthermore, the asymptotic expression is also derived to examine the influence of the various configuration parameters on the secrecy performance of the mixed relaying system. At last, some numerical and simulation results are given to verify the theoretical analysis. INTRODUCTIONVisible light communication (VLC) has recently received considerable attention as a promising technique in the 5G/6G wireless communication [1]. With the increasing demand for the wireless communication networks and limited spectrum resources, light emitting diodes (LEDs) are used as sources, and an optical signal operated in a visible light band with a large bandwidth is used as a carrier of information source to realize the information transmission. VLC has both lighting and communication functions, and achieves an effective, green, and promising technology to realize the last mile of wireless communication. VLC has been widely used in shortdistance, small-scale, and indoor wireless communication. Due to the above mentioned characteristics of VLC, the scope of VLC application is limited [2,3]. Fortunately, the wireless relay can solve these problems well. Meanwhile, the VLCbased relaying system can obtain larger link capacity and better coverage.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.