Tracking of the instantaneous bandwidth in bio-signals: the Copula-based positive distribution and generalized equivalent bandwidth

Hisashi Yoshida; Sho Kikkawa

doi:10.1117/12.564253

26 October 2004 Tracking of the instantaneous bandwidth in bio-signals: the Copula-based positive distribution and generalized equivalent bandwidth

Hisashi Yoshida, Sho Kikkawa

Author Affiliations +

Proceedings Volume 5559, Advanced Signal Processing Algorithms, Architectures, and Implementations XIV; (2004) https://doi.org/10.1117/12.564253
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

In this paper, we propose a method for tracking of a instantaneous equivalent bandwidth (IEBW) of non-stationary random signals. IEBW is defined on the positve time-frequency distribution of a non-stationary random signal by using Renyi entropy. It is a natural extension of a equivalent bandwidth for stationary random signals. In order to obtain the positive time-frequency satisfying the marginals of a random signal, we have modified a copula-based time-frequency technique slightly. We, then, showed the results of two simple computer simulations. The results show that the method presented here can track the IEBW of the random signals properly. We also applied the method to track the change of the IEBW of the heart sound. The results suggest that tracking the IEBW could be a useful index for automatic diagnostic of heart disease.

Citation Download Citation

Hisashi Yoshida and Sho Kikkawa "Tracking of the instantaneous bandwidth in bio-signals: the Copula-based positive distribution and generalized equivalent bandwidth", Proc. SPIE 5559, Advanced Signal Processing Algorithms, Architectures, and Implementations XIV, (26 October 2004); https://doi.org/10.1117/12.564253

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