Error-rate characteristics of oversampled analog-to-digital conversion

Z Cvetkovic*, M Vetterli

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

25 Citations (Scopus)

Abstract

Accuracy of simple analog-to-digital conversion depends on both resolution of discretization in amplitude and resolution of discretization in time. For implementation convenience, high conversion accuracy is attained by refining the discretization in time using oversampling. It is commonly believed that oversampling adversely impacts rate-distortion properties of the conversion, since the bit rate, B, increases linearly with oversampling, resulting in a slow error decay in the bit rate, on the order of O (1/B). We demonstrate that the information obtained in the process of oversampled analog-to-digital conversion can easily be encoded in a manner which requires only a logarithmic increase of the bit rate with redundancy, achieving an exponential error decay in the bit rate.

Original languageEnglish
Pages (from-to)1961-1964
Number of pages4
JournalIEEE TRANSACTIONS ON INFORMATION THEORY
Volume44
Issue number5
Publication statusPublished - Sept 1998

Keywords

  • error-rate characteristics
  • oversampled A/D conversion

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