Paper Info
Title
Multi-Antenna Covert Communication via Full-Duplex Jamming Against a Warden With Uncertain Locations
Abstract
Covert communication can hide the information transmission process from the warden to prevent adversarial eavesdropping. However, it becomes challenging when the location of warden is uncertain. In this paper, we propose a covert communication scheme against a warden with uncertain locations, which maximizes the connectivity throughput between a multi-antenna transmitter and a full-duplex jamming receiver with the limit of covert outage probability (the probability of the transmission found by the warden). First, we analyze the monotonicity of the covert outage probability to obtain the optimal location for the warden. Then, under this worst situation, we optimize the transmission rate, the transmit power and the jamming power of covert communication to maximize the connection throughput. This problem is solved in two stages. First, we derive the transmit-to-jamming power ratio limit from the maximum allowed covert outage probability. With this constraint, the connection probability is maximized over the transmit-to-jamming power ratio for a fixed transmission rate. Since the connection probability and the transmission rate are coupled, the bisection method is applied to maximize the connectivity throughput via optimizing the transmission rate iteratively. Simulation results are presented to evaluate the effectiveness of the proposed scheme.
Year
DOI
Venue
2021
10.1109/TWC.2021.3068096
IEEE Transactions on Wireless Communications
Keywords
DocType
Volume
Active warden,artificial jamming,covert communication,full-duplex,low probability of detection
Journal
20
Issue
ISSN
Citations 
8
1536-1276
2
PageRank 
References 
Authors
0.36
0
7
Name
Order
Citations
PageRank
Xiaoyu Chen121.04
Wen Sun2709.60
Chengwen Xing389173.77
Nan Zhao41591123.85
Yunfei Chen530628.07
Fei Yu65116335.58
Arumugam Nallanathan73694237.64