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Electromagnetic leakage signal recovery and enhancement method and system

A technology of leaking signal and enhancing the system, which is applied in the parts of TV system, transmission system, baseband system, etc., can solve the problem that the signal-to-noise ratio cannot be well restored and enhance the video signal, and achieve strong intelligibility, The effect of increasing attack power

Active Publication Date: 2019-11-01
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0005] One of the objectives of the present invention is to provide an electromagnetic leakage signal recovery and enhancement system to solve the technical problem in the prior art that only improving the signal-to-noise ratio cannot restore and enhance the video signal well

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  • Electromagnetic leakage signal recovery and enhancement method and system
  • Electromagnetic leakage signal recovery and enhancement method and system
  • Electromagnetic leakage signal recovery and enhancement method and system

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Embodiment 2

[0097] In the second aspect, in order to reflect the superiority of the electromagnetic leakage signal recovery and enhancement method provided by the embodiment of the present invention, the embodiment of the present invention also provides an electromagnetic leakage signal recovery and enhancement system, including:

[0098] An electromagnetic leakage signal model building module is used to establish an electromagnetic leakage signal model according to the environmental noise and wireless channel noise contained in the received electromagnetic leakage signal;

[0099] The adaptive inverse filtering processing module is used to divide the received electromagnetic leakage signal into a high-frequency electromagnetic leakage signal part and a low-frequency electromagnetic leakage signal part and perform adaptive inverse filtering processing respectively;

[0100] The restoration and enhancement model acquisition module is used to combine the output signals of the high-frequency ...

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Abstract

The invention relates to an electromagnetic leakage signal recovery-enhancement method and system. The method comprises that an electromagnetic leakage signal model including environment noises and wireless channel noises is established according to characteristics of the environment and wireless channel noises; according to the electromagnetic leakage signal model, an electrical leakage signal is divided into a high-frequency electromagnetic leakage signal portion and a low-frequency electromagnetic leakage signal portion, and self-adaptive inverse filtering is carried out on the high-frequency electromagnetic leakage signal portion and the low-frequency electromagnetic leakage signal portion; and the high-frequency electromagnetic leakage signal portion and the low-frequency electromagnetic leakage signal portion pass blind equalizers thereof to obtain output signals respectively, and the two output signals are combined in the convex combination manner to obtain an electromagnetic leakage signal recovery and enhancement model. The recovery-enhancement method can be used to effectively recover and enhance received video signals according to the physical characteristics of the electromagnetic leakage signal so that the video signals is high in the understandability, and the attack capability of TEMPEST is improved.

Description

technical field [0001] The invention relates to the technical field of electromagnetic environment safety protection, in particular to a method and system for restoring and enhancing electromagnetic leakage signals. Background technique [0002] Electromagnetic leakage includes radiation leakage and conduction leakage. At present, the anti-electromagnetic leakage technology is becoming more and more perfect, and the leakage electromagnetic wave signal sent by the digital system is very weak. If the electromagnetic leakage signal needs to be utilized, the electromagnetic leakage signal will be submerged in a large amount of noise. However, due to the uncertainty of the noise in the actual environment, it is challenging to extract and restore the electromagnetic leakage signal. [0003] Video signal post-processing capability is one of the key technologies restricting TEMPEST (Transient Electromagnetic PulseEmanation Surveillance Technology, electromagnetic environment safet...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04B1/10H04N5/21
Inventor 丁雪洁
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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