| 基于虚拟仪器技术的信号瞬时频率提取 |
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| 引用本文： | 尚秋峰,刘静. 基于虚拟仪器技术的信号瞬时频率提取[J]. 电测与仪表, 2009, 46(3) |
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| 作者姓名： | 尚秋峰 刘静 |
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| 作者单位： | 华北电力大学电气与电子工程学院,河北,保定,071003 |
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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： | 本文结合LabVIEW虚拟仪器开发平台和Matlab软件强大的数值分析功能的优点,将Matlab和LabVIEW混合编程技术应用于信号处理领域,设计了利用加权平滑相位差分对实信号进行瞬时频率估计的虚拟仪器.该方法既能提供良好的计算机用户图形界面,又能实现对信号瞬时频率的提取.仿真实验验证了典型的线性调频信号以及指数型调频信号在SNR为30dB和10dB条件下瞬时频率测量误差分别为0.01,0.05左右.结果表明此种方法在高信噪比条件下可以达到较高的测量精度.
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| 关 键 词： | 瞬时频率 相位差分 |
Instantaneous Frequency Extracting Based on Virtual Instrument Technology |
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| SHANG Qiu-feng,LIU Jing. Instantaneous Frequency Extracting Based on Virtual Instrument Technology[J]. Electrical Measurement & Instrumentation, 2009, 46(3) |
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| Authors: | SHANG Qiu-feng LIU Jing |
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| Affiliation: | SHANG Qiu-feng,LIU Jing(College of Electric Power , Electronic Engineering,North China Electric Power University,Baoding 071003,Hebei China) |
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| Abstract: | This paper combines the LabVIEW virtual instrument development environment and the merit of Matlab software which is a high-performance software for technical computer.It uses the combined programming technology of LabVIEW and Matlab in signal processing and designed the virtual instrument that using weighted smoothing phase-difference method to estimate the instantaneous frequency of solid signal.The computer-user graphical interface was designed well in this way,and the signal instantaneous frequency was ... |
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| Keywords: | LabVIEW Matlab |
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