浅谈铁路FSK信号的频谱分析

The Spectrum Analysis of FSK Signal

频谱分析技术是解决泄漏和噪声的问题分析方法之一。铁路信号频谱细化后,并不是简单的一条谱线,而是一簇谱线。为提取有用频谱,必须把残留的泄漏频谱剔除。工频谐波干扰是影响信号频谱的主要原因之一,也是造成现场无码区段乱上灯的重要根源。由于工频基波、谐波有其特定的谱结构,因此,可以利用其相互关联的特征,去除干扰。

The spectral analysis of technology is solves one of divulging and noise problem analysis ＂methods. After railway signal frequency spectrum refinement, is not a simple spectral line, but is a bunch of spectral line. For the extraction useful frequency spectrum, must the residual divulging frequency spectrum rejection. The power frequency harmonic interference affects one of signal frequency spectrum primary causes, is also causes the scene not to have the important root which the code sector lights a lamp randomly. Because the power frequency fundamental wave, the overtone have its specific spectrum structure, therefore, may use its incident cross-correlation the characteristic, elimination disturbance.