On semi-classical questions related to signal analysis

Article type: Research Article

Authors: Helffer, B. | Laleg-Kirati, T.M.^;

Affiliations: Département de Mathématiques, Université Paris Sud, Orsay, France | King Abdullah University of Sciences and Technology, Thuwal, KSA

Note: [] Corresponding author: T.M. Laleg-Kirati, King Abdullah University of Sciences and Technology, Thuwal, KSA. Tel.: +966 2 808 0371; E-mail: taousmeriem.Laleg@kaust.edu.sa.

Abstract: This study explores the reconstruction of a signal using spectral quantities associated with some self-adjoint realization of an h-dependent Schrödinger operator −h2(d2/dx2)−y(x), h>0, when the parameter h tends to 0. Theoretical results in semi-classical analysis are proved. Some numerical results are also presented. We first consider as a toy model the sech 2 function. Then we study a real signal given by arterial blood pressure measurements. This approach seems to be very promising in signal analysis. Indeed it provides new spectral quantities that can give relevant information on some signals as it is the case for arterial blood pressure signal.

Keywords: semi-classical analysis, Schrödinger operator, signal analysis, arterial blood pressure

DOI: 10.3233/ASY-2011-1054

Journal: Asymptotic Analysis, vol. 75, no. 3-4, pp. 125-144, 2011