Covert Communication With Uninformed Backscatters in Hybrid Active/Passive Wireless Networks: Modeling and Performance Analysis

Ma, Wenyuan; Niu, Zhiang; Wang, Wei; He, Shiyue; Jiang, Tao

doi:10.1109/tcomm.2022.3147791

Cited by 17 publications

(2 citation statements)

References 41 publications

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“…Recent studies [30][31][32] have built upon this foundation, demonstrating that exploiting uncertainty about noise can effectively enhance covert performance in IRS covert communication. Furthermore, research has delved into the optimization of transmission power and reflection beamforming in IRS networks [30,[33][34][35][36][37].…”

Section: Related Workmentioning

confidence: 99%

Optimization of Intelligent-Reflecting-Surface-Enabled Covert Communication in Multi-Sensor Systems

Feng,

Ji,

Zhu

et al. 2024

Applied Sciences

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This study investigates covert communication in multi-sensor systems employing Intelligent Reflecting Surfaces (IRSs). Different from previous works, we focus on optimizing transmission amplitudes and phase angles for a 2-BPSK codebook in the presence of asymmetric noise over complex Gaussian channels. We adopt KL divergence as a covertness constraint and mutual information as a metric for transmission rate. We employ Taylor series expansion to approximate KL divergence and mutual information. Leveraging these approximations, we derive optimal phase angles through a proposed gradient descent algorithm. The numerical simulations validate the effectiveness and precision of our Taylor approximation method. Through validation in different scenarios, our algorithm demonstrates robust convergence, deriving all optimal phase angles. Comparing initial phase angles from prior works to those obtained via our algorithm, we observe a higher covert transmission rate.

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Section: Related Workmentioning

confidence: 99%

Optimization of Intelligent-Reflecting-Surface-Enabled Covert Communication in Multi-Sensor Systems

Feng,

Ji,

Zhu

et al. 2024

Applied Sciences

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“…The core idea is to exploit the warden's noise uncertainty to supply covertness and achieve a non-zero covert rate. Jamming [17], [18], interference [19], [20] and artificial noise [21], [22] are applicable sources of noise uncertainty. Other uncertainties at the warden were also exploited, such as the uncertainty of transmission time [23], that of transmit power [24], and that of channel [25], [26] as an additional factor, along with the noise uncertainty, to improve covertness and increase the covert rate.…”

mentioning

confidence: 99%

Covert Communications Over Non-Orthogonal Multiple Overt Channels

Ho-Van

Costa

et al. 2022

IEEE Access

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The paper exploits overt information of non-orthogonal multiple access (NOMA) systems for camouflage to hide covert information. The optimum strategy of hiding information at the transmitter, accounting for the probability of the warden's detection error and the resulting spectral efficiency of the covert information under the covertness requirement, is determined. The results show that the optimum strategy of hiding the covert information is to superimpose it onto the overt NOMA information which is hardest-decoded, increasing to 1 the probability of detection error at the warden when the number of NOMA users accretes. This indicates that the multiplicity of NOMA users can be leveraged to hide the covert information in NOMA systems. In addition, various results prove the increase in the covert spectral efficiency with increasing the number of NOMA users while guaranteeing the probability of the warden's detection error close to 1. INDEX TERMS Covert communication, non-orthogonal multiple access, probability of detection I. INTRODUCTION

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Intelligent reflecting surface aided covert wireless communication exploiting deep reinforcement learning

Liu

et al. 2022

Wireless Netw

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Covert Communication With Uninformed Backscatters in Hybrid Active/Passive Wireless Networks: Modeling and Performance Analysis

Cited by 17 publications

References 41 publications

Optimization of Intelligent-Reflecting-Surface-Enabled Covert Communication in Multi-Sensor Systems

Optimization of Intelligent-Reflecting-Surface-Enabled Covert Communication in Multi-Sensor Systems

Covert Communications Over Non-Orthogonal Multiple Overt Channels

Intelligent reflecting surface aided covert wireless communication exploiting deep reinforcement learning

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