摘 要:在轨道信号检测中，如何高精度的检测出当前的轨道移频信号一直是保证列车安全运行的重要课题。根据我国轨道移频信号的特点，在采用OMAPL137芯片为主的硬件平台下，采用欠采样和ZFFT的方法对移频信号进行检测，并阐述将算法在硬件平台下实现的流程，为便携式测试仪的设计提供基础。该系统实时性高，稳定性好，可扩展性强。[著者文摘]
关键词:移频信号 欠采样 ZFFT OMAP
分类号: TP302[著者标引]文献标识码：A**编号：1674-6236（2012）05-0051-04栏目信息：计算机技术与应用
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Soft design of the railway frequency-shift signal testing system based on OMAPLI1XYANG Ming-ji, LI Shi-yu College of Measure-control Technology and Communication Engineering,Harbin University of Science and Technology, Harbin 150080, ChinaAbstract:In the railway signal detection, how to detect the present railway frequency shift signal precisely has been always a hot issue on ensuring the train working safely. According to the characteristic of the railway frequency shift signal of our country, based on the hardware platform primarily on OMAPL137 chip, we use under the method of sampling and ZFFY to detect the frequency shift signal, and we also state how the algorithm realize on the hardware platform, which is the foundation of the design of the portable tester. This system is quite real-time, and it has a high stability and a strong extensibility.W[著者文摘]
Key words:frequency shift signal; under sampling; ZFFT; OMAP |
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