A covert communication system using non-zero mean normal distributions

Xu，Zhijiang1,3; Lu，Weidang2,3; Gong，Yi3; Hua，Jingyu4; Jin，Wenbing1

2020-09-01

10.13164/RE.2020.0580

Radioengineering   影响因子和分区

1210-2512

A covert communication system is proposed in this study, in which a non-zero mean Gaussian sequence is used as a random carrier and its mean is modulated by a covert binary bit. The aperiodic transmitted signal exhibits the same statistical characteristics as the ambient noise to confuse an eavesdropper. The received signal is multiplied with the pseudo-random sequence synchronized with the transmitter to recover these positive and negative mean Gaussian sequence. The sample mean estimator and hard decision are used to determine the covert message, and accordingly, theoretical bit error rate in additive white Gaussian noise channel is also derived. Simulation results are very consistent with the theoretical derivation. The proposed system works in the physical layer with the advantages of simple structure, strong concealment, good BER performance and very suitable for low-cost, resource-limited and low-rate transmission devices.

Covert communication Kullback-leibler divergence Normal distribution

SCI

英语

非南科大

National Natural Science Foundation of China[61871348] ; Peng Cheng Laboratory[PCL2018KP002] ; Shenzhen Science and Technology Program[JSGG20180508151852303]

Engineering

Engineering, Electrical & Electronic

WOS:000586540100019

SPOLECNOST PRO RADIOELEKTRONICKE INZENYRSTVI

2-s2.0-85092040347

Scopus

1.School of Automation,Zhejiang Institute of Mechanical and Electrical Engineering,Hangzhou,Binwen Rd. 528,310052,China
2.College of Information Engineering,Zhejiang University of Technology,Hangzhou,Liuhe Rd. 288,310023,China
3.Univ. Key Laboratory of Advanced Wireless Communications of Guangdong Province,Dept. of Electrical and Electronic Engineering,Southern Univ. of Science and Technology,Shenzhen,Xueyuan Blvd. 1088,518055,China
4.School of Information and Electronic Engineering,Zhejiang Gongshang University,Hangzhou,Xuezheng Street 18,310018,China

Xu，Zhijiang,Lu，Weidang,Gong，Yi,et al. A covert communication system using non-zero mean normal distributions[J]. Radioengineering,2020,29(3):580-588.

Xu，Zhijiang,Lu，Weidang,Gong，Yi,Hua，Jingyu,&Jin，Wenbing.(2020).A covert communication system using non-zero mean normal distributions.Radioengineering,29(3),580-588.

Xu，Zhijiang,et al."A covert communication system using non-zero mean normal distributions".Radioengineering 29.3(2020):580-588.