Research on frequency shift signal detection algorithm for jointless track circuits based on improved relaxation algorithm

The accuracy of ZPW-2000 frequency shift signal demodulation is related to the safety and efficiency of high-speed trains. This paper proposed a kind of ZPW-2000 frequency-shift signal detection algorithm based on improved Relaxation algorithm (ZFSD-IR) to address the issue of low accuracy in detect...

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Veröffentlicht in:Scientific reports Jg. 14; H. 1; S. 25625 - 14
Hauptverfasser: Ji, Guanggang, Ge, Bizhou, Wang, Hongkai, Cui, Fukai
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London Nature Publishing Group UK 27.10.2024
Nature Publishing Group
Nature Portfolio
Schlagworte:
639/166/987
639/766/930
Accuracy
Algorithms
Comparative analysis
Fourier analysis
Fourier transforms
High speed rail
Humanities and Social Sciences
Locomotives
multidisciplinary
Science
Science (multidisciplinary)
Spectrum analysis
ISSN:2045-2322, 2045-2322
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Zusammenfassung:The accuracy of ZPW-2000 frequency shift signal demodulation is related to the safety and efficiency of high-speed trains. This paper proposed a kind of ZPW-2000 frequency-shift signal detection algorithm based on improved Relaxation algorithm (ZFSD-IR) to address the issue of low accuracy in detecting ZPW-2000 frequency shift signal under strong noise interference, as the traditional fast Fourier transform (FFT) spectrum analysis methods are susceptible to fence effects and spectrum leakage effects. Firstly, the principle of ZPW-2000 jointless track circuit was analyzed, and then the ideal and simplified models of ZPW-2000 frequency shift signal were established, respectively. Finally, the simulation experiments were conducted on ZPW-2000 frequency shift signal detection under different sampling durations and signal-to-noise ratios (SNR). The effectiveness of the proposed algorithm was verified through comparative analysis with the traditional algorithms. The research results indicated that the ZFSD-IR algorithm has better accuracy in carrier-frequency and low-frequency estimation than traditional algorithms, and can achieve accurate detection of ZPW-2000 frequency shift signal under the lower SNR conditions. It has high detection accuracy and good anti-interference ability, ensuring the safe operation of high-speed trains.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-77793-w