STUDY OF CORRELATION CODING.

Abstract

This report contains the results of studies intended to determine and analyze methods by which analog information can be used to improve the performance of essential digital coding schemes. A technique called supergmd, an extension and combination of the generalized minimum distance decoding and concatenation concepts, was developed and extensively evaluated for the white gaussian channel. It is concluded that supergmd exceeds the performance of any other algebraic scheme and equals or exceeds that of sequential decoding: however, its extreme computational demands raise doubts about its practical utility. A modification of a posteriori (APP) decoding which results in an algorithm simply implementable with digital components required to operate only once per decoded bit was developed and evaluated. Several other aspects of coding and information theory are investigated. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1967
Accession Number
AD0822106

Entities

People

  • G. David Forney Jr

Tags

DTIC Thesaurus Topics

  • Algorithms
  • Coding
  • Decoding
  • Gaussian Channels
  • Information Theory
  • Mathematics
  • Notation

Readers

  • Educational Psychology
  • Mathematical Modeling and Probability Theory.
  • Radio communications and signal processing.