Title: Study on noise control of digital circuit signal transmission under strong magnetic field interference

Authors: Xiaoxu Zhong

Addresses: Department of Urban Rail Transit and Information Engineering, Anhui Communications Vocational & Technical College, Hefei 230051, China; College of Information Science and Technology, University of Science and Technology of China, Hefei 230026, China

Abstract: In order to overcome the problems of low detection rate of strong magnetic field interference, low signal-to-noise ratio and long control time of digital circuit signal transmission noise in traditional control methods, a noise control method of digital circuit signal transmission under strong magnetic field interference is proposed. The mixed signal of digital circuit is extracted, interpolated and power normalised, and the strong magnetic field interference is identified according to the non-stationary degree of signal noise. The input noise signal is segmented in real time from left to right, and the segmented noise subsequence is decomposed by EMD. Combined with the decomposition results, the noise controller structure is designed to realise noise control. Experimental results show that the maximum detection rate of strong magnetic field interference is 98%, the average value of signal-to-noise ratio is 59.4 dB, and the average value of signal transmission noise control time of digital circuit is 73 ms.

Keywords: strong magnetic field interference; digital circuit; noise control; signal transmission; EMD decomposition.

DOI: 10.1504/IJESDF.2023.130666

International Journal of Electronic Security and Digital Forensics, 2023 Vol.15 No.3, pp.301 - 314

Received: 30 May 2022
Accepted: 05 Oct 2022
Published online: 02 May 2023 *

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