基于虚拟仪器技术的信号瞬时频率提取 instantaneous frequency extracting based on virtual instrument technology.pdfVIP
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基于虚拟仪器技术的信号瞬时频率提取 instantaneous frequency extracting based on virtual instrument technology
总第46卷第519期 电测与仪表 V01.46No.519
2009年第03期 ElectricalMeasurement&Instrumentation Mar.20|D9
基于虚拟仪器技术的信号瞬时频率提取水
尚秋峰,刘静
(华北电力大学电气与电子工程学院,河北保定071003)
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
此种方法在高信噪比条件下可以达到较高的测量精度。
关键词:瞬时频率;相位差分;LabVlEW;Matlab
中图分类号:TM935;TP391.9 文献标识码:A
Instantaneous BasedonVirtualInstrument
FrequencyExtracting
SHANG
Qiu-feng,LIUJing
ofElectricand
PowerElectronic ChinaElectric
(College Engineering,North
Power
University,Baoding071003,HebeiChina)
Abstract:ThiscombinestheLabVIEWvirtualinstrument environmentandthemeritofMatlab
paper development
softwarewhichisa softwarefortechnical USeSthecombined
high-performance computer.It programmingtechnology
ofLabVIEWandMatlabin and thevirtualinstrumentthat
signalprocessingdesigned usingweightedsmoothing
methodtoestimatetheinstantaneousofsolid
phase-difference frequency signal.Thecomputer-usergraphical
interfacewas wellinthis the instantaneouswasextracted.Thesimulationresults
designed way,andsignal frequency
showthattheinstantaneousmeasurementeITorsofthe LMF and FM are
frequency typical signalexponentialsignal
about theconditionthatSNRarelOdBand30dB.The showsthatthismethod
0.01,0.05,respectively,in experiment
couldbeextracted in SNR.
high
effectively
words:instantaneous
Key freq
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