摘要
传统的模极大值序列处理方法虽然可以保留信号特征,但降噪后的信号在奇异点有毛刺和轻微的振荡。模极大值序列的改进方法是对模极大值序列进行软阈值处理,由于软阈值函数是连续的,所以降噪信号会更加光滑。通过MATLAB仿真实验说明,改进方法能有效地改善毛刺和振荡现象。
Although traditional processing method of modulus maximum array can retain characteristics of signal, the signal after de-noising exists thorns and slight oscillation at singularity point. The improved method is that soft threshold is used to process modulus maximum array. Because the soft threshold func- tion is continuous, the signal after de-noising becomes more smooth. The MATLAB simulation results confirm that the improved method can improve the phenomenon of thorn and oscillation effectively.
出处
《南京邮电大学学报（自然科学版）》
2009年第1期74-77,共4页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
南京邮电大学青蓝计划(NY206037)资助项目
关键词
模极大值
奇异点
软阈值函数
MATLAB仿真
modulus maximum
singularity point
soft threshold function
MATLAB simulation
