TY - JOUR
T1 - Covert Communications in Intelligent Reflecting Surface-Assisted Two-Way Relaying Networks
AU - Deng, Dan
AU - Li, Xingwang
AU - Dang, Shuping
AU - Gursoy, M. Cenk
AU - Nallanathan, Arumugam
N1 - Funding Information:
This work was supported in part by the Natural Science Foundation of Guangdong Province under Grant 2022A1515010999, in part by the Scientific Research Project of Education Department of Guangdong under Grant 2021KCXTD061, in part by the Science and Technology Program of Guangzhou under Grant 202201011850, in part by Yangcheng Scholar, Scientific Research Project of Guangzhou Education Bureau under Grant 202032761, and in part by the Application Technology Collaborative Innovation Center of GZPYP under Grant 2020ZX01.
Publisher Copyright:
© 1967-2012 IEEE.
PY - 2022/11/1
Y1 - 2022/11/1
N2 - Covert communications is critical in many application scenarios for ensuring transmission security and privacy. Two-way protocols are widely adopted in intelligent reflecting surface (IRS) assisted relaying networks to enable covert communications and prevent wireless signals from being overheard. To quantify the performance of covert communications in this special scenario, we derive the closed-form expression of outage probability and its asymptote in this paper. Considering the worst-case of covert communications, the optimal normalized power threshold of warden's detector is analyzed under a complex Gaussian distribution approximation. To meet the requirement of the detection error probability, the ratio of the transmission power between the covert nodes is investigated. Simulation results are provided to validate the theoretical expressions as well as the asymptotic analysis with a small number of reflecting elements.
AB - Covert communications is critical in many application scenarios for ensuring transmission security and privacy. Two-way protocols are widely adopted in intelligent reflecting surface (IRS) assisted relaying networks to enable covert communications and prevent wireless signals from being overheard. To quantify the performance of covert communications in this special scenario, we derive the closed-form expression of outage probability and its asymptote in this paper. Considering the worst-case of covert communications, the optimal normalized power threshold of warden's detector is analyzed under a complex Gaussian distribution approximation. To meet the requirement of the detection error probability, the ratio of the transmission power between the covert nodes is investigated. Simulation results are provided to validate the theoretical expressions as well as the asymptotic analysis with a small number of reflecting elements.
KW - Covert communications
KW - detection error probability
KW - intelligent reflecting surface
KW - outage probability
KW - two-way transmission
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U2 - 10.1109/TVT.2022.3194194
DO - 10.1109/TVT.2022.3194194
M3 - Article
AN - SCOPUS:85135749612
SN - 0018-9545
VL - 71
SP - 12380
EP - 12385
JO - IEEE Transactions on Vehicular Communications
JF - IEEE Transactions on Vehicular Communications
IS - 11
ER -