Robust and efficient filterbank structure for reconstruction form recurrent nonunifrom samples

M. Karthik, K.M.M. Prabhu, P.C.W. Sommen, B.B.A.J. Bloemendal

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

Samenvatting

In this paper, we present a robust and efficient structure for the reconstruction of uniform samples of a signal from its recurrent nonuniform samples. This structure makes use of the synthesis part of a uniform discrete Fourier transform (DFT) modulated filterbank. The proposed structure is a refinement over an existing filterbank structure that utilizes the inverse of a nonuniform DFT matrix, the numerical stability of which cannot be guaranteed. The poor numerical stability of the inverse is overcome in a modified structure by inverting a preconditioned matrix having an improved numerically stable inverse. Necessary and sufficient conditions that ensure numerical stability of the preconditioned matrix inverse have been presented.
Originele taal-2Engels
TitelProceedings of the 18th European Signal Processing Conference (EUSIPCO 2010), 23-27 August 2010, Aalborg, Denmark
Plaats van productieZ.pl.
Uitgeverijs.n.
Pagina's1597-1601
StatusGepubliceerd - 2010

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