Journal
SIGNAL PROCESSING
Volume 90, Issue 2, Pages 684-688Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.sigpro.2009.07.010
Keywords
Adaptive signed correlation index; Trichotomization; Morphology
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We propose a simple index, termed adaptive signed correlation index (ASCI), to quantify the morphological similarity between signals. The ASCI between two signals is calculated by trichotomizing each signal based on predefined three signal subspaces, then calculating the signed correlation of the trichotomized vectors. Examples are shown to compare ASCI with conventional correlation coefficients with respect to the effects of signal perturbation and additive noise. The ASCI provides a robust and efficient measure of morphological similarity and has particular applications in embedded systems involving biological signal analysis. (C) 2009 Elsevier B.V. All rights reserved.
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