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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。
Spectrum analysis is one of the solutions to the problem of leakage and noise. After the detailed refinement of the railway signal spectrum, it is not a simple spectral line but a series of spectral lines. In order to extract the useful spectrum, the residual leakage spectrum must be rejected. Power frequency harmonic interference is one of the main factors affecting the signal spectrum, but also caused the site codeless chaos lights on the important source. Due to the fundamental frequency of harmonics, the harmonics have their own specific spectral structure, so that their interrelated features can be used to remove the interference.