COMPRESSIVE SPECTRAL RENORMALIZATION METHOD

Year 2018, Volume: 8 Issue: 2, 425 - 437, 01.12.2018

C. Bayındır

Abstract

In this paper a novel numerical scheme for nding the sparse self-localized states of a nonlinear system of equations with missing spectral data is introduced. As in the Petviashivili's and the spectral renormalization method, the governing equation is transformed into Fourier domain, but the iterations are performed for far fewer number of spectral components M than classical versions of the these methods with higher number of spectral components N . After the converge criteria is achieved for M components, N component signal is reconstructed from M components by using the l1 minimization technique of the compressive sampling. This method can be named as compressive spectral renormalization CSRM method. The main advantage of the CSRM is that, it is capable of nding the sparse self-localized states of the evolution equation s with many spectral data missing.

Keywords

Spectral renormalization, Petviashivili's method, compressive sampling, spectral methods, nonlinear Schrodinger equation.

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