| 基于局部频谱细化的轨道移频信号高精度检测 |
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| 引用本文： | 焦玮琦,陈特放.基于局部频谱细化的轨道移频信号高精度检测[J].机车电传动,2009(2). |
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| 作者姓名： | 焦玮琦 陈特放 |
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| 作者单位： | 中南大学,信息科学与工程学院,湖南,长沙,410075 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 轨道移频信号检测技术中多采用FFT的频谱分析方法,但是由于轨道移频信号的检测需要较高的频率分辨率,FFT的分析方法会影响到频谱分析的真实性.对此,引入局部频谱细化的方法对轨道移频信号的低频频率进行检测,并用MATLAB对算法进行仿真,仿真结果表明局部频谱细化法可以应用于轨道移频信号的检测中,且精度较高.
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| 关 键 词： | 局部频谱细化 轨道移频信号 检测 |
High-accuracy Detection of Track Circuit Frequency-shift Signal Based on the Zoom in the Local Spectrum |
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| JIAO Wei-qi,CHEN Te-fang.High-accuracy Detection of Track Circuit Frequency-shift Signal Based on the Zoom in the Local Spectrum[J].Electric Drive For Locomotive,2009(2). |
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| Authors: | JIAO Wei-qi CHEN Te-fang |
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| Affiliation: | School of Information Science and Engineering;Central South University;Changsha;Hunan 410075;China |
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| Abstract: | The FFT frequency analysis method is usually used in the track circuit frequency-shift signal detection, but for the reason that the detection needs a high resolving power of frequency, the FFT analysis method may affect the authenticity of the spectrum analysis. So the zoom in the local spectrum method is adopted. The article also uses the MATLAB to simulate the arithmetic and the simulation result indicates that this method can improve the precision of the track circuit frequency-shift signal detection. |
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| Keywords: | MATLAB |
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