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A Robust Beamforming Design Method for Covert Communications in the Internet of Things

A covert communication and beamforming technology, applied in wireless communication, diversity/multi-antenna systems, space transmit diversity, etc., can solve problems such as eavesdropping channel restrictions, security threats, and raw data exposure of confidential information

Active Publication Date: 2022-02-01
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Additionally, as ever-evolving wireless systems face increasing security threats, even when transmitted information is encrypted, potential eavesdropping channels are physically restricted, and the raw data itself may expose confidential information

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  • A Robust Beamforming Design Method for Covert Communications in the Internet of Things
  • A Robust Beamforming Design Method for Covert Communications in the Internet of Things
  • A Robust Beamforming Design Method for Covert Communications in the Internet of Things

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Embodiment Construction

[0020] In the present invention, the following notation is adopted: bold lowercase letters and uppercase letters represent vectors and matrices respectively. ||·||, Tr(·), Re(·) and Im(·) denote the expectation, Frobenius norm, trace, real part and imaginary part of the parameter, respectively. operator It means that A is positive semi-definite. Expressed as a mean of μ and a variance of σ 2 The complex-valued circularly symmetric Gaussian distribution for .

[0021] Scenarios considered by the present invention are as figure 1 As shown, where Alice (base station) sends the private data stream x b Send to Bob (hidden user). The present invention proposes a robust beamforming design method for covert communication of the Internet of Things, including the following steps:

[0022] Step 1, establishing a covert communication environment;

[0023] Step 2, in the case of imperfect WCSI (Willie's channel state information), carry out covert beamforming design.

[0024] St...

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Abstract

The present invention provides a robust beamforming design method for covert communication of the Internet of Things, considering the covert beamforming design for the Intelligent Reflective Surface (IRS) assisted Internet of Things (IoT) network, the present invention studies Alice's joint beamformer designed to maximize Bob's concealment rate when Alice does not fully know Willie's channel state information (WCSI). For non-ideal WCSI, deduce Willie's optimal decision threshold, and analyze the probability of false positives and missed detections in this case. Furthermore, in this case, a robust beamformer based on relaxation, S‑rocedure and alternate iterative methods is built using the Kullback‑Leibler discretization property.

Description

technical field [0001] The invention relates to a robust beamforming design method for covert communication of the Internet of Things. Background technique [0002] Over the past few years, the Internet of Things (IoT) has been widely used in various fields such as industry, agriculture, and medicine. The explosive growth in the number of smart communication devices and the steady increase in data-hungry wireless applications require IoT networks to be more spectrally and energy-efficient (Cited: S. Gong, X. Lu, D.T. Hoang, D. Niyato, L. .Shu, D.I.Kim, and Y.C.Liang, "Toward smart wireless communications via intelligent reflecting surfaces: A contemporary survey," IEEE Commun.Surv.Tutor., vol.22, no.4, pp.2283–2314, 2020. ). Fortunately, intelligent reflective surfaces (IRS) have recently been recognized as a promising solution to improve the spectral and energy efficiency of wireless networks by reconfiguring the wireless propagation environment. [0003] IRS, also known...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0426H04B7/06H04B7/08H04W12/02
CPCH04B7/043H04B7/0617H04B7/086H04W12/02H04B7/04013
Inventor 马帅盛海鸿张蕴琪李世银
Owner CHINA UNIV OF MINING & TECH