• 低频控制 - 引用次数：2

  By comparing with the existing method with time-domain analysis three algorithms discussed in this paper are predominant in qualities. The algorithms can give effectively judgment for the track circuit FSK and low frequency control signal.

  三种算法都解调出轨道电路移频信号和低频控制信号的频率，与以前的时域分析法相比，有了质的提高，能有效的判别轨道电路移频信号的频率与低频控制信号。

  参考来源 - 轨道移频信号特征频率提取

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