A Comparison of Three Equalization Techniques for iNET-Formatted SOQPSK-TG

Abstract

This paper demonstrates the effectiveness of the zero-forcing, minimum mean-squared error, and constant-modulus equalizers in improving the BER performance of iNET-formatted SOQPSK-TG. The equalization algorithms leverage the existence of known bit sequences in the preamble and ASM fields of the iNET packet to realize data-aided equalizers. The effectiveness of these equalization techniques over ten test channels, derived from channel sounding experiments at Edwards AFB, was evaluated. The BER curves for nine out of the ten test channels display the desirable waterfall shape. The BER curve for the remaining test channel displays a BER floor. Fortunately, the BER floor is low enough to allow error correcting codes, such as the iNET LDPC code, to correct the errors and provide virtually error-free performance.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2014
Accession Number
ADA619897

Entities

People

  • Arlene Cole-rhodes
  • Farzad Moazzami
  • Michael Rice
  • Mohammad Saquib

Organizations

  • Air Force Test Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Adaptive Filters
  • Algorithms
  • Coefficients
  • Detectors
  • Electronic Mail
  • Engineering
  • Equalization
  • Estimators
  • Filters
  • Frequency
  • Frequency Bands
  • Frequency Domain
  • Multipath Channels
  • Resource Management
  • Shape
  • Simulations
  • Test And Evaluation

Readers

  • Radio communications and signal processing.