摘要
针对含有高斯噪声的宽频时变信号,利用LabVIEW强大的信号处理函数库设计了基于LabVIEW的虚拟去噪系统,该系统去噪快捷高效.对含有高斯噪声的宽频时变信号进行功率谱分析,根据其频谱特性进行小波阈值去噪,通过对各种不同阈值去噪准则及软硬阈值去噪结果进行对比分析,寻找阈值去噪方法的最优参数.结果表明,基于LabVIEW阈值去噪法对含有高斯噪声的宽频时变信号具有较好的效果,在时频域都表现了优良的特征.
A virtual denoising system w hich is fast and efficient is designed for broadband timevarying signal by using the powerful signal processing function library based on LabVIEW .The power spectrum of broadband timevarying signal containing gaussian noise is analyzed in the paper and wavelet threshold denoising is used based on their spectral features .The optimal parameters of thresholding methods is searched by analyzing and comparing the results of different thresholding criteria and the hard and soft threshold denosing . The results show that thresholding method based on LabVIEW for broadband timevarying signal achieves good effect and present excellent characteristics in the timefrequency dom ain .
出处
《陕西科技大学学报（自然科学版）》
2014年第6期161-164,174,共5页
Journal of Shaanxi University of Science & Technology
基金
陕西省科技厅科研计划项目(2011K02-11)
