GENG Qi, WEN Yinghong, LIU Shanghe, ZHANG Dan. A VMD Based Improved De-noising of Onboard BTM Receiving Signal[J]. Chinese Journal of Electronics, 2020, 29(1): 66-72. doi: 10.1049/cje.2019.10.001
Citation: GENG Qi, WEN Yinghong, LIU Shanghe, ZHANG Dan. A VMD Based Improved De-noising of Onboard BTM Receiving Signal[J]. Chinese Journal of Electronics, 2020, 29(1): 66-72. doi: 10.1049/cje.2019.10.001

A VMD Based Improved De-noising of Onboard BTM Receiving Signal

doi: 10.1049/cje.2019.10.001
Funds:  This work is supported by the National Natural Science Foundation of China (No.U1734203), the National Natural Science Foundation of China (No.61631013), and Beijing Municipal Science & Technology Commission (No.Z181100001018032).
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  • Corresponding author: ZHANG Dan (corresponding author) was born in 1985. She received the B.S. and Ph.D. degree from Beijing Jiaotong University, Beijing, China, in 2008 and 2017. She is currently a lecturer in Beijing Jiaotong University. Her research interests include EMC in transportation system, crosstalk, and method of moments. (Email:zhangd@bjtu.edu.cn)
  • Received Date: 2019-04-04
  • Rev Recd Date: 2019-06-13
  • Publish Date: 2020-01-10
  • As a key equipment of the high-speed Electric multiple unit (EMU), the Balise transmission module (BTM) is tend to be affected by electromagnetic disturbances. However, the existing filter can not well eliminate electromagnetic disturbances. In order to improve the Signal to noise ratio (SNR) of BTM uplink signal, Variational mode decomposition (VMD) method is introduced into de-noising the uplink signal polluted by disturbance. The proposed de-noising method decomposes the noise-polluted signal into several narrow band subsignals. And then, the de-noised BTM transmitting signal is reconstructed by the sub-signals of the same frequency as the BTM carrier. To improve the accuracy of the VMD based signal decomposition, the Normalized short time fourier transform-Wigner ville distribution (NSTFTWVD) method are applied to determine the decomposition mode number of the target signal. The proposed method is used to deal with both simulation signal and measured BTM uplink signal. Results demonstrated good improvement in SNR by 20dB and 12.63dB, respectively.
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