/a>> Vol.4 No.3B, August 2013
Share This Article:
Cite This Paper >>

Performance Comparison of Three Algorithms Applied to UM2000 Signal Demodulation

Abstract Full-Text HTML Download Download as PDF (Size:150KB) PP. 58-61
DOI: 10.4236/jsip.2013.43B010    3,730 Downloads   4,450 Views   Citations
Author(s)    Leave a comment
Zhichao Qiao, Fuping Wang


Department of Electrical Engineering, Tsinghua University, Beijing, China..


UM2000 signal is a type of multi-audio frequency-modulated signal which is widely used for railway blocking. Principles of three typical demodulating algorithms are presented in details in this paper. Bit error rates of the three methods at different SNRs are achieved by Monte Carlo simulation experiments. Among the three algorithms, the quadrature demodulation has the best performance at the real working environment. However, the three methods have the same problem of phase hopping when noise is too strong.


UM2000 Signal; Differential Frequency Detection; Zero-Crossing Detection; Quadrature Demodulation

Cite this paper

Z. Qiao and F. Wang, "Performance Comparison of Three Algorithms Applied to UM2000 Signal Demodulation," Journal of Signal and Information Processing, Vol. 4 No. 3B, 2013, pp. 58-61. doi: 10.4236/jsip.2013.43B010.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] H. Hui, F. Ye and J. Wang, “An Improved Analytic Method of Across-zero Detecting,” Aerospace Electronic Warfare, Vol. 23, No. 4, 2007, pp. 50-52.
[2] L. Zhu and S. Wu, “Digital Demodulation Method for Multi-tone FM Signal in Track Circuit System,” China Railway Science, Vol. 26, No. 5, 2005, pp. 91-95.
[3] G. Hu, “Digital Signal Processing,” 2nd Edition, Tsinghua University Press, Beijing, 2003.
[4] L. Nan, “Brief Introduction of Communication Principles,” Tsinghua University Press, Beijing, 2000.
[5] F. Wang, “Study on the Decoding Arithmetic of the UM2000 Track Circuit Signal,” Mater’s Thesis, China Academy of Railway Sciences, Beijing, 2010.

comments powered by Disqus
JSIP Subscription
E-Mail Alert
JSIP Most popular papers
Publication Ethics & OA Statement
Frequently Asked Questions
Recommend to Peers
Recommend to Library
Contact Us

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.