小波自适应软门限信号去噪方法研究  

A new approach of signal AST de-noising based on wavelet

作　　者：孙煜[1] 范万春[1] 李真富[1] 

机构地区：[1]西北核技术研究所

出　　处：《核电子学与探测技术》2005年第2期156-159,共4页Nuclear Electronics & Detection Technology

摘　　要：简要介绍了小波多分辨分析的理论基础,在分析信号及噪声随小波分析尺度变化而变化的规律之后,针对小波去噪的核心问题——阈值的设定提出了一种新的方法,即自适应软门限去噪的方法。这种方法具有明确而直观的物理意义,实现简单、方便,通过实验证明,自适应软门限去噪方法具有较好的去噪效果。The theory of wavelet multiresolution pyramid is described in this paper. The characteristics of signal and noise changing with the wavelet scales have been analyzed. Aiming to solve the key problem, the threshold setting of signal de-noising, a new approach, ASTD (Adaptive Soft Threshold De-noising) is provided based on these characteristics. This method is of explicit physical meaning and can be implemented conveniently. The practical computing example shows that it is very efficient.

关 键 词：软门限去噪 信号去噪 自适应 小波去噪 阈值 小波多分辨分析 噪声 设定 小波分析 方法研究 

分 类 号：TN911[电子电信—通信与信息系统]