隐蔽的
计算机科学
电信线路
基站
路径损耗
发射机功率输出
诺玛
电力预算
功率(物理)
实时计算
计算机网络
发射机
功率控制
电信
无线
频道(广播)
哲学
物理
量子力学
语言学
作者
Peng Chen,Liang Yang,Hongwu Liu,Gaofeng Pan,Yanlong Li,Zhi Yan
出处
期刊:IEEE Wireless Communications Letters
[Institute of Electrical and Electronics Engineers]
日期:2023-12-01
卷期号:12 (12): 2278-2282
标识
DOI:10.1109/lwc.2023.3318584
摘要
In this letter, we investigate an active reconfigurable intelligent surface (RIS) and non-orthogonal multiple access (NOMA)-aided covert communication system with hardware impairments, where a base station conducts NOMA downlink transmissions to a covert user and a public user. More specifically, we derive the analytic expressions for the outage probability (OP), the detection error probability (DEP), and optimal detection thresholds. Then, we study the influence of detection threshold, RIS deployment location, and power distribution factor on the covert performance. Compared to the passive RIS system with the same total power budget, numerical results show that the active RIS system achieves better covert performance and effectively overcomes the double path-loss attenuation.
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