Covert Communication with Cognitive Jammer Embedded in Public Communication System [PDF]
SensorsIn this work, we investigate covert communication with a cognitive jammer (CJ) embedded in a public communication system. Specifically, while the transmitter continuously transmits public messages to the receiver, it may also transmit its covert messages
Xiangyu Zhao +4 more
doaj +2 more sources
An Overt Chemical Protective Garment Reduces Thermal Strain Compared with a Covert Garment in Warm-Wet but Not Hot-Dry Environments [PDF]
Frontiers in Physiology, 2017 Objectives: A commercial chemical, biological, radiological and nuclear (CBRN) protective covert garment has recently been developed with the aim of reducing thermal strain.
Matthew J. Maley +6 more
doaj +5 more sources
Cooperative Jamming and Relay Selection for Covert Communications Based on Reinforcement Learning [PDF]
SensorsTo overcome the obstacles of maintaining covert transmissions in wireless networks employing collaborative wardens, we develop a reinforcement learning framework that jointly optimizes cooperative jamming strategies and relay selection mechanisms.
Jin Qian +5 more
doaj +2 more sources
UAV-Assisted Covert Communication with Dual-Mode Stochastic Jamming [PDF]
SensorsCovert communication assisted by unmanned aerial vehicles (UAVs) can achieve a low detection probability in complex environments through auxiliary strategies, including dynamic trajectory planning and power management, etc. This paper proposes a dual-UAV
Mingyang Gu +4 more
doaj +2 more sources
Covert Communications via Full-Duplex User Relaying [PDF]
SensorsIn this paper, we investigate a covert communication system with a full-duplex decode-and-forward (DF) relay and introduce a user-relaying scheme that maximizes the covert rate while ensuring the covertness requirement.
Jong Yeol Ryu, Jung Hoon Lee
doaj +2 more sources
Joint Hovering Height, Power, and Rate Optimization for Air-to-Ground UAV-RSMA Covert Communications
Drones, 2023 In this paper, we investigate covert communications for an unmanned aerial vehicle (UAV)-aided rate-splitting multiple access (RSMA) system in which the UAV transmits to the covert and public users separately while shielding covert transmissions from a ...
Kang Ma +4 more
doaj +1 more source
On IRS-Assisted Covert Communication with a Friendly UAV
Drones, 2023 Driven by the rapidly growing demand for information security, covert wireless communication has become an essential technology and attracted tremendous attention.
Xiaobei Xu +6 more
doaj +1 more source
Disguised Full-Duplex Covert Communications
Sensors, 2023 Covert communications have arisen as an effective communications security measure that overcomes some of the limitations of cryptography and physical layer security.
Jihwan Moon
doaj +1 more source
Covert Communication for Wireless Networks with Full-Duplex Multiantenna Relay
Complexity, 2022 In this work, we investigated a covert communication method in wireless networks, which is realized by multiantenna full-duplex single relay. In the first stage, the source node sends covert messages to the relay, and the relay uses a single antenna to ...
Ling Yang +5 more
doaj +1 more source
Covert Transmission with Antenna Selection and Using an External Jammer [PDF]
AUT Journal of Modeling and Simulation, 2020 This paper adopts the antenna selection technique to enhance the covert rate in a wireless communication network comprised of a source, a destination, an external jammer and an eavesdropper. In the covert communication, the level of transmit power is low
Morteza Sarkheil +3 more
doaj +1 more source