铁路通信信号工程技术2023，Vol.20Issue(z1)：63-69,80,8.DOI:10.3969/j.issn.1673-4440.2023.Z1.015
基于Hanning窗四谱线插值FFT的轨道电路信号解析研究
Track Circuit Signal Analysis Based on Hanning Window Four-spectrum-line Interpolation FFT
温术来1
作者信息
- 1. 北京铁路信号有限公司,北京 102613
- 折叠
摘要
Abstract
Frequency-shift signal is one of the most important features of ZPW-2000A track circuit system,and high-accuracy analysis of the signal is of great significance.Based on the characteristics of the signal,a high-accuracy FSK signal parameter algorithm is put forward in this paper based on time domain window function and frequency domain interpolation method,and the algorithm is verified through simulation.Results show that using windows in time domain of the signal can reduce the spectral leakage resulting from traditional FFT method,and further interpolation in frequency domain is used to improve the accuracy of signal parameter analysis.By using the proposed algorithm to analyze frequency-shift track circuits,the maximum error of the carrier frequency is 0.000 32 Hz and the maximum error of the modulation frequency is 0.002 63 Hz.These errors are within the acceptable range for analyzing track circuit signal parameters.关键词
轨道电路/四谱线插值/快速傅里叶变换/移频信号Key words
track circuit/four-spectrum-line interpolation/FFT/frequency-shift signal分类
交通工程引用本文复制引用
温术来..基于Hanning窗四谱线插值FFT的轨道电路信号解析研究[J].铁路通信信号工程技术,2023,20(z1):63-69,80,8.
