Single-Bit Oversampled A/D Conversion with Exponential Accuracy in the Bit-Rate

  • Authors:
  • Zoran Cvetkovic;Ingrid Daubechies

  • Affiliations:
  • -;-

  • Venue:
  • DCC '00 Proceedings of the Conference on Data Compression
  • Year:
  • 2000

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Abstract

We present a scheme for simple oversampled analog-to-digital conversion, with single bit quantization and exponential error decay in the bit-rate. The scheme is based on recording positions of zero-crossings of the input signal added to a deterministic dither function. This information can be represented in a manner which requires only logarithmic increase of the bit rate with the oversampling factor, $r$. The input band-limited signal can be reconstructed from this information locally, and with a mean squared error, which is inversely proportional to the square of the oversampling factor. Consequently, the mean squared error of this scheme exhibits exponential decay in the bit-rate.