DocumentCode :
2749194
Title :
The research on video signal electromagnetic radiation of computer based on near-field testing data
Author :
Zhang Hong-xin ; Lu Ying-hua ; Qiu Yu-chun ; Si Yu ; Zhao Li-ang
Author_Institution :
Beijing Univ. of Posts & Telecommun., China
fYear :
2003
fDate :
4-7 Nov. 2003
Firstpage :
69
Lastpage :
72
Abstract :
Computer circuits are very complex and there are various signals in them. A computer can radiate electromagnetic waves when working. Some of these radiations may result in computer information leakage. A video signal electromagnetic radiation model is set up based on near zone testing data, and the far zone video electromagnetic radiation is estimated using computational electromagnetics. Furthermore, it is proposed to investigate noise in the propagation path using the FDTD method, and the noise is modeled as a stochastic process rather than determined variables. Thus, the time-variant characteristic of noise in the propagation path is studied. Then, electromagnetic radiation with 16 dB degrees is simulated. Lastly, the recovered word images are given, after the video electromagnetic information leakage is processed through synchronization, correlated filtering, phase locking, recognition and reconstruction technology, etc. The characteristics of information leakage are studied and discussed.
Keywords :
computational electromagnetics; correlation methods; electromagnetic wave propagation; filtering theory; image reconstruction; parameter estimation; pattern recognition; random noise; security of data; stochastic processes; synchronisation; video signal processing; FDTD method; complex circuits; computational electromagnetics; computer electromagnetic leakage; computer information leakage; correlated filtering; electromagnetic wave radiation; far zone video electromagnetic radiation estimation; image reconstruction; near zone testing data; near-field testing data; pattern recognition; phase locking; propagation path; stochastic process; synchronization; video signal electromagnetic radiation; word image recovery; Circuit testing; Computational electromagnetics; Computational modeling; Electromagnetic modeling; Electromagnetic propagation; Electromagnetic radiation; Electromagnetic scattering; Finite difference methods; Information filtering; Stochastic processes;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Environmental Electromagnetics, 2003. CEEM 2003. Proceedings. Asia-Pacific Conference on
Conference_Location :
Hangzhou, China
Print_ISBN :
7-5635-0802-3
Type :
conf
DOI :
10.1109/CEEM.2003.238537
Filename :
1282246
Link To Document :
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