基于改进SSTDR的铁路信号同步精准识别技术提升研究

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中图分类号：TP393.1；TQ333.7 文献标志码：A 文章编号：1001-5922（2026）1-0262-04

Abstract：To address the demand for preciserailway signal cable fault location，this study proposes anoptimized SSTDR-based railway signal method and technology with signal synchronization.Spread Spectrum Time Domain Reflectometry（SSTDR）isadoptedasthe fundamental method forrailway signal cable fault location.In light of fault types caused by cable traveling wave transmission andcable aging，a signal filtering scheme is added to the basic SSTDR method，and signal acquisition and synchronization approaches are introduced to improve the cro-correlation peak recognition rate offault signals.A physical verification platform is built，where test signals aregenerated via Direct Digital Synthesis（DDS）and Field-Programmable Gate Arry（FPGA）technologies，enabling accurate locationand identificationof open-circuit faultsatdiferent distances.Experimental resultsdemonstrate thatcompared with the basic SSTDR method，the SSTDR method based on signal synchronization exhibits significantly beter performance in terms of fault location measurement distance and noise interference ratio.

Key words ：railway signal;cable malfunction;spread spectrum time-domain reflectometry;cross-correlation peak ; sliding correlation synchronization method

传统的铁路信号检测多采用人工巡检、定期检测等方式，普遍存在效率低下、实时性差、难以发现潜在故障等问题，无法满足现代铁路高速、重载、高密度运行的需求。（剩余4778字）