Results 21 to 30 of about 2,289 (258)
Performance analysis of covert wireless communication based on beam forming with noise uncertainty
Tongxin xuebao, 2020 In order to establish covert wireless communication in Rayleigh fading environment with noise uncertainty,a scheme of downlink covert wireless communication based on complex Gaussian random coding and beam forming was adopted,and more importantly,the ...
Yuda LIN +3 more
doaj +2 more sources
Gaussian Signalling for Covert Communications [PDF]
IEEE Transactions on Wireless Communications, 2019 In this work, we examine the optimality of Gaussian signalling for covert communications with an upper bound on $\mathcal{D}(p_{_1}||p_{_0})$ or $\mathcal{D}(p_{_0}||p_{_1})$ as the covertness constraint, where $\mathcal{D}(p_{_1}||p_{_0})$ and $\mathcal{D}(p_{_0}||p_{_1})$ are different due to the asymmetry of Kullback-Leibler divergence, $p_{_0}(y ...
Shihao Yan +3 more
openaire +3 more sources
Beamforming Design and Covert Performance Analysis for Full-Duplex Multiantenna System
Complexity, 2021 In this work, a wireless covert communication system with full-duplex (FD) multiantenna receiver is considered. In order to improve the convert performance of the wireless communication system in the FD mode, a scheme based on selection combining/zero ...
Ling Yang +5 more
doaj +1 more source
Journal of Low Power Electronics and Applications, 2022 With increasing interest in multi-core systems, such as any communication systems, infra-structures can become targets for information leakages via covert channel communication. Covert channel attacks lead to leaking secret information and data.
Parisa Rahimi +2 more
doaj +1 more source
STAR-RIS Aided Covert Communications
GLOBECOM 2023 - 2023 IEEE Global Communications Conference, 2023 This paper investigates the multi-antenna covert communications assisted by a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS). In particular, to shelter the existence of communications between transmitter and receiver from a warden, a friendly full-duplex receiver with two antennas is leveraged to make ...
Han Xiao +6 more
openaire +4 more sources
Covert communications on Poisson packet channels [PDF]
2015 53rd Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2015 Allerton 2015 submission, minor edits ...
Ramin Soltani +3 more
openaire +2 more sources
Study on Airspace Covert Communication Algorithm of Covert Communication System
Journal of Networks, 2012 Based on the security of information transmission through network in the information society, the paper puts forward covert communication technology which is more reliable than the prior encryption algorithm, analyzes channel covertness and information hiding of covert communication technology based on spread-spectrum communication technology, and ...
openaire +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Rates of cancer among adolescents and young adults (AYA), age 15–39 years, are increasing. Consequently, radiation oncologists are treating more AYAs who have diagnoses spanning both pediatric and adult practices. Compared to pediatric and older adult patients, AYAs face a unique set of challenges.
Hesham Elhalawani +7 more
wiley +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Latino children are projected to make up nearly one‐third of United States (US) children by 2060, and many of their caregivers speak Spanish. Prior survey research has documented communication difficulties for Spanish‐speaking caregivers of children with cancer, but contemporary qualitative data are limited.
Jenny Ruiz +6 more
wiley +1 more source
A Covert Channel Over VoLTE via Adjusting Silence Periods
IEEE Access, 2018 Covert channels represent unforeseen communication methods that exploit authorized overt communication as the carrier medium for covert messages. Covert channels can be a secure and effective means of transmitting confidential information hidden in overt
Xiaosong Zhang +4 more
doaj +1 more source