Impulsive noise reduction by using M-transform and wavelet shrinkage

• Autorzy: Harada, H. , Kashiwagi, H. , Kaba, K. , Yamaguchi, T.
• Języki publikacji: EN

Abstrakty

EN

In this paper, the authors propose a new method for reducing both impulsive and white noise by use of M-transform and wavelet shrinkage. M-transform is a new signal transformation technique proposed by the authors, and any periodic time signal can be M-transformed into a sum of pseudorandom M-sequence. By using this property, it is shown that both impulsive noise and white noise can be M-transformed into small amplitude signals, which are removed by use of suitable filter, such as wavelet shrinkage.

Słowa kluczowe

PL

przekształcenie falkowe; przetwarzanie sygnałów

EN

wavelet transform; wavelet shrinkage; M-transform; signal processing; filtering theory

• Czasopismo: Systems Science
• Rocznik: 2005
• Tom: Vol. 31, no 3
• Strony: 5-11
• Opis fizyczny: Bibliogr. 3 poz., wykr.

Twórcy

autor

Harada, H.

• Department of Mechanical Engineering, Kumamoto University, Kurokami 2-39-1, J-860 Kumamoto, Japan

autor

Kashiwagi, H.

autor

Kaba, K.

autor

Yamaguchi, T.

Bibliografia

• [1] Donoho D.L., De-noising by Soft-thresholding, IEEE Trans. Information Theory, Vol. 41, No. 2, 1995, 613-627.
• [2] Kashiwagi H., Liu M., Harada H., Yamaguchi T., M-transform and its Application to System Identification, Trans, of SICE, Vol. E-l, No. 1, 2002, 289-294.
• [3] Harada H., Kashiwagi H., Andoh T., Kaba K., Impulsive Noise Reduction by Use of M-Transform, Trans, of SICE, Vol. 39, No. 7, 2003, 688-690, (in Japanese).