Computer Engineering and Applications ›› 2015, Vol. 51 ›› Issue (13): 216-220.

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Denoising algorithm of wavelet modulus maximum based on Blackman window interpolation

ZHAO Hongtu, LIU Yun   

  1. School of Computer Science and Technique, Henan Polytechnic University, Jiaozuo, Hennan 454000, China
  • Online:2015-07-01 Published:2015-06-30

Blackman窗插值的小波模极大值去噪算法

赵鸿图,刘  云   

  1. 河南理工大学 计算机科学与技术学院,河南 焦作 454000

Abstract: The Blackman window interpolation algorithm is put forward, the signal modulus maxima are obtained by Ad Hoc algorithm, the signal estimated coefficients of wavelet can be obtained from the interpolation of Blackman window between the modulus maxima points of signal and reconstruct signal by the signal estimated wavelet coefficients. The simulation results demonstrate that the novel algorithm with the fast speed of modulus maximum direct reconstruction algorithm and the accuracy of alternating projection algorithm, improves the SNR and reduces the distortion.

Key words: interpolation of Blackman window, modulus maximum, wavelet coefficients, reconstruct signal

摘要: 提出了Blackman窗插值算法,通过Ad Hoc算法得到信号模极大值,利用Blackman窗对信号模极大值点进行插值,得到信号的估计小波系数进而依此小波系数直接重构信号。仿真结果表明,该算法具备了模极大值直接重构算法的快捷性和交替投影法的精确性,提高了信噪比,降低了失真度。

关键词: Blackman窗插值, 模极大值, 小波系数, 重构信号