Research on Digital Filter Performance Based on LabVIEW
In order to study the filter performance,LabVIEW is used to design a filter performance research system.The sinu-soid and white noise signals with adjustable amplitude and frequency are output through the waveform generating function in LabVIEW.The white noise is passed through the filter,it is superimposition with sine wave,and the sine wave signal is out-put by the filter,and then the spectral characteristics of the sinusoid are output through FFT.The results show that the sinu-soidal signal with small noise can be filtered without distortion through a certain filter.When the amplitude of noise is large,the output of the filter is distorted,the sinusoidal signal can be recovered without distortion by adjusting the tap number of fil-ter.The designed system has intuitive interface and simple operation,which can be applied to teaching and scientific research.
万方数据
维普
