摘要
小波阈值降噪方法中,传统硬阈值函数连续性差,传统软阈值函数过于光滑,本文针对传统方法的缺点提出一种基于压缩能量思想的阈值函数。通过Matlab仿真表明,改进的阈值函数使用minimaxi阈值效果较好,改进的方案比传统的软、硬、半软阈值降噪能得到较高的信噪比,使信号得到较好的滤波效果。
In wavelet threshold de-noising method, the traditional hard thresholding function has poor continuity, the traditional soft threshold function is too smooth, this paper proposes a new threshold function based on energy compression thought. According to the simulation results of matlab, this improved method is better than the traditional ones.
出处
《电子设计工程》
2014年第1期11-13,16,共4页
Electronic Design Engineering
基金
国家科技重大专项(专题)(2011ZX05009-005-04E)
