Study On Software Noise Reduction Method Of The Intercepted Information In The Computer

On the basis of software radio technology and ideas, this article in-depth studies the video signal noise reduction method for the intercepted information in the computer to restore the video. The article first introduces the research background, which are the basic concepts of software radio, computer information security theory and the TEMPST technology. Then based on the research methods of digital signal process and the principles and methods of computer video leaking, the paper in-depth researches the technique of video Reveal the characteristics of the signal, wireless transmitted noise and wireless interference. According to the video signal characteristics, the paper studies the method of video detection.During the processing of the video signal, the paper researches the traditional Time Domain Accumulation Method and comb filtering method. According to the video signal characteristics, a simulation by using MATLAB is made in order to verify the designs of this paper. The simulation results show that the signal to noise ratio is indeed increased.Finally, the paper introduces the computer video information capture platform. And designed comb filter is applied in video capture and ultimately restores the video information to achieve good results. This research study for low SNR signal has some practical value. KEY WORDS:information leakage time domain accumulation comb filter SNR information identification degree FFT...