| 欠采样与ZFFT在移频信号检测中的应用 |
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| 引用本文： | 袁薇,孙景峰,樊文侠.欠采样与ZFFT在移频信号检测中的应用[J].电子科技,2010,23(3):65-67,80. |
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| 作者姓名： | 袁薇 孙景峰 樊文侠 |
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| 作者单位： | （1西安邮电学院 电子信息工程系,陕西 西安710061;2西安工业大学 电子信息工程学院,陕西 西安710032） |
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| 摘 要： | 轨道移频信号检测需要具有相对较高的频率分辨率。在检测仪器内存和FFT计算长度有限制的情况下,为进一步获得较高的频率分辨率,则需对有用频段进行选频细化分析。文中将欠采样技术与ZOOM-FFT频谱细化技术相结合,用Matlab软件,对国产18信息轨道移频信号检测算法进行仿真验证,结果表明所提出的检测算法是可行的,并为轨道电路移频信号检测仪表的设计提供了方法依据。
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| 关 键 词： | 移频信号 欠采样 ZOOM-FFT 频率分辨率 Matlab仿真 |
Application of Under-rate Sampling and ZOOM-FFT in Frequency Shift Detection |
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| Yuan Wei,Sun Jingfeng,Fan Wenxia.Application of Under-rate Sampling and ZOOM-FFT in Frequency Shift Detection[J].Electronic Science and Technology,2010,23(3):65-67,80. |
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| Authors: | Yuan Wei Sun Jingfeng Fan Wenxia |
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| Affiliation: | (1Department of Electronic Information Engineering,Xian University of Post and Telecommunications,Xian 710061,China;
2College of Electric Information Engineering,Xian Technological University,Xian 710032,China) |
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| Abstract: | Frequency-shift keying signal detection needs a relatively high frequency resolution.With the limit to the detection equipment memory and FFT calculated length in the detection algorithm,the useful frequency band needs to be selected and partially analyzed if we want to obtain a higher frequency resolution.This paper combines the under-rate sampling technology and the spectrum refining technology,and simulates and verifies the detection algorithm of the home-made 18 information track circuit frequency shift... |
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| Keywords: | frequency-shift signal under-rate sampling ZOOM-FFT frequency resolution Matlab simulation |
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