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ISSN:2394-3661 | Crossref DOI | SJIF: 5.138 | PIF: 3.854

International Journal of Engineering and Applied Sciences

(An ISO 9001:2008 Certified Online and Print Journal)

Improvement and Simulation Analysis of Wavelet Threshold Algorithm

( Volume 4 Issue 12,December 2017 ) OPEN ACCESS

Jun Guo, Yao Wang, Wenjun Yi


By studying the traditional threshold function , it is found that the hard threshold function is discontinuous , the pseudo - Gibbs phenomenon occurs , and the soft threshold function is too much eliminating the detail coefficient , which causes the loss of high - frequency signal . The simulation experiment of Wavelet threshold noise reduction for different sonar signals is carried out. The experimental results show that the improved threshold function is better than the conventional algorithm , and the noise - reducing signal has higher SNR and smaller RMSE.

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