Structure of a sampling rate converter based on elementary signal processing blocks

  • Authors:

  • Eduardo Martos-Naya;Jesús López-Fernández;Luis Díez del Río;José Tomás Entrambasaguas Muòoz

  • Affiliations:

  • Departamento de Ingeniería de Comunicaciones E.T.S.I.T., University of Málaga, Campus Teatinos, E-29071 Málaga, Spain;Departamento de Ingeniería de Comunicaciones E.T.S.I.T., University of Málaga, Campus Teatinos, E-29071 Málaga, Spain;Departamento de Ingeniería de Comunicaciones E.T.S.I.T., University of Málaga, Campus Teatinos, E-29071 Málaga, Spain;Departamento de Ingeniería de Comunicaciones E.T.S.I.T., University of Málaga, Campus Teatinos, E-29071 Málaga, Spain

  • Venue:
  • Digital Signal Processing
  • Year:
  • 2008

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Abstract

Sampling rate conversion is a technique widely used in many areas. For the most general case of an irrational and time varying conversion factor, a discrete time varying filter is needed together with a sample skip and/or sample duplicate operation. The functionality of this skip/duplicate block has not been treated in proper depth in the bibliography and in many cases it has been ambiguously described and located in the structure of a sampling rate converter. In this paper a detailed analysis of a sampling rate converter for an arbitrary and variable ratio is revisited. The operations involved to carry out the conversion and the order in which they must be performed lead to a novel structure where only elementary signal processing blocks (adders, multipliers, delays, and decimators) are employed to describe both the filtering and the skip/duplicate operations. This structure constitutes an improvement in clarity with respect to previous works.