Adaptive Modulation and Error Control Techniques

Abstract

This report contains the results of an investigation designed to develop, analyze, and evaluate techniques to improve the quality of digital data transmission by adapting the modulation or error control parameters to varying channel conditions. Specific systems for varying the bit rate and the alphabet size are postulated and evaluated analytically in realistic channel environments. Variable block length and variable redundancy error control techniques are described and analyzed in a computer simulation of real channels. In addition, the operation and performance of a laboratory prototype of an adaptive error correction decoder that does not require feedback is described.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1966
Accession Number
AD0484188

Entities

People

  • R. J. Benice

Organizations

  • International Business Machines Corporation (Armonk, NY)

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Amplitude Modulation
  • Coding
  • Communication Channels
  • Communication Systems
  • Computational Science
  • Computer Simulations
  • Control Systems
  • Decoding
  • Detectors
  • Digital Communications
  • Digital Data
  • Frequency Bands
  • Frequency Diversity
  • Frequency Shift
  • Modulation
  • Random Variables
  • Surveys

Readers

  • Computational Modeling and Simulation
  • Radio communications and signal processing.