IRS-assisted covert communication with eavesdropper's channel and noise information uncertainties

被引:4
作者
Zou, Li [1 ,2 ]
Zhang, Dingcai [1 ]
Cui, Miao [1 ,2 ]
Zhang, Guangchi [1 ,3 ,4 ]
Wu, Qingqing [5 ]
机构
[1] Guangdong Univ Technol, Sch Informat Engn, Guangzhou, Peoples R China
[2] State Key Lab Integrated Serv Networks, Xian, Peoples R China
[3] Guangdong Univ Technol, Sch Informat Engn, Guangzhou, Peoples R China
[4] Guangdong Univ Technol, Guangdong Prov Key Lab Informat Photon Technol, Guangzhou, Peoples R China
[5] Univ Macau, State Key Lab Internet Things Smart City, Macau, Macao, Peoples R China
关键词
Covert communication; Intelligent reflecting surface; Channel information uncertainty; Noise information uncertainty; Joint optimization; INTELLIGENT; LIMITS;
D O I
10.1016/j.phycom.2022.101662
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper considers an intelligent reflecting surface (IRS)-assisted covert communication system, where an IRS is deployed for the covert transmission from a legitimate transmitter (Alice) to a legitimate receiver (Bob) with the presence of an eavesdropper (Willie). Since Willie is not a legitimate communication node and cannot control the IRS's reflection, it has uncertainty about the channel information of the Alice-IRS and IRS-Willie links. Meanwhile, Willie also has uncertainty about its noise power. Having such channel and noise information uncertainties, Willie finds an optimal power detection threshold to minimize its false detection probability. Under this system setup, we investigate maximizing the covert rate of the legitimate communication from Alice to Bob, by jointly optimizing Alice's transmit power and the IRS's reflecting phase shifts. We have proposed two efficient joint optimization algorithms for the continuous and discrete IRS reflecting phase shift cases, respectively. The proposed algorithm for the previous case is based on the semidefinite relaxation technique, and that for the latter case is based on the alternating optimization technique. Simulation results have demonstrated the superiority and necessity of jointly optimizing the transmit power and IRS reflecting phase shifts on improving the covert rate performance, as compared to other benchmark schemes. (c) 2022 Elsevier B.V. All rights reserved.
引用
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页数:10
相关论文
共 19 条
[1]   Hiding Information in Noise: Fundamental Limits of Covert Wireless Communication [J].
Bash, Boulat A. ;
Goeckel, Dennis ;
Towsley, Don ;
Guha, Saikat .
IEEE COMMUNICATIONS MAGAZINE, 2015, 53 (12) :26-+
[2]   Limits of Reliable Communication with Low Probability of Detection on AWGN Channels [J].
Bash, Boulat A. ;
Goeckel, Dennis ;
Towsley, Don .
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 2013, 31 (09) :1921-1930
[3]   Ghostbuster: Detecting the Presence of Hidden Eavesdroppers [J].
Chaman, Anadi ;
Wang, Jiaming ;
Sun, Jiachen ;
Hassanieh, Haitham ;
Choudhury, Romit Roy .
MOBICOM'18: PROCEEDINGS OF THE 24TH ANNUAL INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND NETWORKING, 2018, :337-351
[4]   On Covert Communication With Noise Uncertainty [J].
He, Biao ;
Yan, Shihao ;
Zhou, Xiangyun ;
Lau, Vincent K. N. .
IEEE COMMUNICATIONS LETTERS, 2017, 21 (04) :941-944
[5]   Intelligent Reflecting Surface Assisted Covert Communication With Transmission Probability Optimization [J].
Kong, Justin ;
Dagefus, Fikadu T. ;
Choi, Jihun ;
Spasojevic, Predrag .
IEEE WIRELESS COMMUNICATIONS LETTERS, 2021, 10 (08) :1825-1829
[6]   Achieving Undetectable Communication [J].
Lee, Seonwoo ;
Baxley, Robert J. ;
Weitnauer, Mary Ann ;
Walkenhorst, Brett .
IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING, 2015, 9 (07) :1195-1205
[7]   Parallel Factor Decomposition Channel Estimation in RIS-Assisted Multi-User MISO Communication [J].
Li Wei ;
Huang, Chongwen ;
Alexandropoulos, George C. ;
Yuen, Chau .
2020 IEEE 11TH SENSOR ARRAY AND MULTICHANNEL SIGNAL PROCESSING WORKSHOP (SAM), 2020,
[8]   Intelligent Reflecting Surface Enabled Covert Communications in Wireless Networks [J].
Lu, Xiao ;
Hossain, Ekram ;
Shafique, Taniya ;
Feng, Shaohan ;
Jiang, Hai ;
Niyato, Dusit .
IEEE NETWORK, 2020, 34 (05) :148-155
[9]   Semidefinite Relaxation of Quadratic Optimization Problems [J].
Luo, Zhi-Quan ;
Ma, Wing-Kin ;
So, Anthony Man-Cho ;
Ye, Yinyu ;
Zhang, Shuzhong .
IEEE SIGNAL PROCESSING MAGAZINE, 2010, 27 (03) :20-34
[10]  
Lv L., COVERT COMMUNICATION