小波变换阈值降噪方法及在武器自动机数据处理中的应用

Wavelet transform threshold noise reduction methods and the application in automatic rifle

研究基于小波变换的信号降噪的原理和方法,从中选择阈值法降噪。详细论述了该方法的原理,特点和利用MATLAB中小波分析工具箱进行设计的步骤。对默认阈值消噪处理,强制消噪处理,给定阈值消噪处理3种阈值处理方法和rigrsure,heursure,sqtwolog,minimax 4种阈值选择方法进行了定性和定量比较,并实现了自动机数据信号降噪的计算机仿真。通过比较,得出在处理实际自动机数据信号时,给定阈值消噪处理方法中的heursure阈值和rigrsure阈值选取规则能够更有效去除噪声。

Researches the principle and method of the noise reduction based on wavelet transform, chooses the threshold noise reduction, and describes in detail the principles, features and design steps of the threshold method by means of the wavelet analysis toolbox of MatLAB. Rigrsure, default threshold noise reduction, forcible threshold noise reduction, bestowal threshold noise reduction three kinds of methods, and, rigrsure, heursure, sqtwolog and minimaxi four kinds of threshold selection methods are compared qualitatively and quantitatively. Realizes computer simulation of the signal noise reduction. When dealing with the actual signal of the automatic rifle, heursure and rigrsure threshold method of bestowal threshold noise reduction shows more effective to eliminate noise.