当前位置: X-MOL 学术EURASIP J. Wirel. Commun. Netw. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
On the performance of physical layer security in virtual full-duplex non-orthogonal multiple access system
EURASIP Journal on Wireless Communications and Networking ( IF 2.6 ) Pub Date : 2021-06-12 , DOI: 10.1186/s13638-021-02009-y
Weidong Guo , Yuxi Liu

This paper investigates physical layer security analysis of cooperative non-orthogonal multiple access (NOMA) communication system. A virtual full-duplex (VFD) relaying scheme with an untrusted amplify-and-forward (AF) half-duplex (HD) relay and a trusted decode-and-forward (DF) HD relay is used in this system to improve the spectral efficiency. In order to prevent the untrusted relay from eavesdropping, a simple and practical cooperative jamming scheme is designed to confuse the untrusted relay. The exact expressions of effective secrecy throughput (EST) for NOMA users and approximate expression of EST for non-NOMA user are derived. All theoretical results are validated by numerical simulations which demonstrate that the proposed VFD-NOMA scheme is superior to existing HD-NOMA scheme in cooperative system and jamming plays an important role for obtaining acceptable EST. In addition, simulation results shows that the best secrecy performance highly depends on the system parameters such as transmit powers and jamming signal power.



中文翻译:

虚拟全双工非正交多址系统物理层安全性能研究

本文研究了协作非正交多址 (NOMA) 通信系统的物理层安全性分析。该系统使用具有不可信放大转发 (AF) 半双工 (HD) 中继和可信解码转发 (DF) HD 中继的虚拟全双工 (VFD) 中继方案来改善频谱效率。为了防止不可信中继窃听,设计了一种简单实用的协同干扰方案来混淆不可信中继。推导出了NOMA用户的有效保密吞吐量(EST)的精确表达式和非NOMA用户的EST近似表达式。所有理论结果均通过数值模拟验证,表明所提出的 VFD-NOMA 方案在协作系统中优于现有的 HD-NOMA 方案,并且干扰对于获得可接受的 EST 起着重要作用。此外,仿真结果表明,最佳保密性能很大程度上取决于发射功率和干扰信号功率等系统参数。

更新日期:2021-06-13
down
wechat
bug