【作者】 苏娟； 杜普选； 崔欣； 姜道勇；

【Author】 SU Juan,DU Pu-xuan ,CUI Xin ,JIANG Dao-yong School of Electronics and Information Engineering,Beijing Jiaotong University,Beijing 100044,China

【机构】 北京交通大学电子信息工程学院；

【摘要】 本文针对频谱分析法的不足以及铁路现场的需要,将实时测频技术用于铁路信号分析中以获得FSK信号的上下边频。作者选择了两种实时算法——频率推算法和相位推算法,提出了一种分制式测频的方案,该方案在测频实验系统中得以实现,并通过现场铁路信号测试。本文提出的这种基于时域的测频方案是对传统频域法的有利补充,大大提高了信号解调的可靠性,同时也满足了铁路现场对信号检测的迫切需要,该方案具有较高的应用价值。更多还原

【Abstract】 For the demand of the railway system and the deficiency of the spectrum analysis, IFM is applied to the demodulation of rail-signals to acquire two key parameters-the upper and lower side frequencies. Both algorithms are explained with their theories and characteristics and a new demodulation scheme of dividing standard is presented. The scheme is carried out in an experimental system and tested by demodulating some rail-signals from practical railway. This demodulation scheme is a favorable supplement of the typical frequency analysis, improving the reliability of demodulation, and simultaneously it satisfies the urgent demand of railway. As a result, the scheme is provided with more applied importance.更多还原