A Note on 'Almost Noiseless' Channels.

Abstract

An 'almost noiseless' channel is defined. The definition corresponds to many physical channels operating at high signal-to-noise ratio. Attention is focused on the decrement in capacity and computation cutoff rate as the noise increases from zero. It is shown that the decrement in R(comp) is dominated by a term proportional to the square root of the noisiest transition probability, alpha, to a nominally noiseless output. In contrast, the decrement in C in many cases of interest is dominated by a term proportional to -(alpha)ln(alpha). Accordingly the decrement in R(comp) can significantly exceed the decrement in C. This paper was presented at the 1979 IEEE International Symposium on Information Theory held in Grignano, Italy on 25-29 June 1979. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 04, 1979
Accession Number
ADA077588

Entities

People

  • Barney Reiffen

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Artificial Satellites
  • Coding
  • Computations
  • Contrast
  • Decoding
  • Downlinks
  • Engineering
  • Information Theory
  • Modulation
  • Numbers
  • Probability
  • Satellite Communications
  • Security
  • Signal Processing
  • Square Roots
  • Uplinks

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  • Control Systems Engineering.
  • International Relations and Conflict Resolution
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