轨道移频信号特征频率小波变换提取探讨

Feature Frequencies Extraction from the Track Frequency Shift Keying Signal

结合频谱分析和小波变换,采用LKJ2000型测试台产生的信号,对轨道电路移频信号进行调解,结果表明所用方法能有效提取轨道电路移频信号的上下边频和低频控制信号的特征频率。最后,对3种特征频率提取方法加以综合,给出了提高信号提取可靠度的逻辑算法。

By using the signal from the LKJ2000 test panel the mediation for the frequency-shift track circuit signal was discussed with the help of the spectrum analysis and wavelet transform, which shows that the method discussed can effectively extract characteristic frequency of the upper and down side frequencies and low-frequency control signal of the frequency-shift track circuit signal, Finally, three types of extraction methods of the characteristic frequency were integrated, and a logical algorithm to enhance the reliability of signal extraction was then given.