A Brief Investigation of Adaptive Decision Feedback Equalization for Digital HF Links Employing PSK (Phase Shift Keying) Modulation.

Abstract

Adaptive decision feedback equalization is one of several mitigation techniques that can be employed to improve the performance of narrowband HF modems operating under time and frequency selective channel conditions. The decision feedback equalizer (DEF) is described and several adaptation algorithms are derived. Computer simulations of BPSK HF modems were used to compare link performance (in terms of bit error rate) with and without employment of an adaptive DFE. Also the performance was quantified versus channel disturbance parameters for a specific 2400 baud modem.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1983
Accession Number
ADA157809

Entities

People

  • B. E. Sawyer

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Human Systems
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Channel Models
  • Communication Systems
  • Computer Simulations
  • Computers
  • Demodulation
  • Department Of Defense
  • Digital Data
  • Engineering
  • Frequency
  • Frequency Shift
  • Intersymbol Interference
  • Modulation
  • Power Spectra
  • Simulations
  • Systems Engineering
  • Waveforms

Fields of Study

  • Engineering

Readers

  • Radio communications and signal processing.