Information-Reduced Carrier Synchronization of BPSK and QPSK Using Soft Decision Feedback

Abstract

This paper addresses the carrier-phase estimation problem under low SNR conditions as are typical of turbo- and LDPC-coded applications. In closed-loop carrier synchronization schemes for error-correction coded BPSK and QPSK modulation were proposed that were based on feeding back hard data decisions at the input of the loop, the purpose being to remove the modulation prior to attempting to track the carrier phase as opposed to the more conventional decision-feedback schemes that incorporate such feedback inside the loop. In this paper, we consider an alternative approach wherein the soft information from the iterative decoder of turbo or LDPC codes is instead used as the feedback.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2006
Accession Number
ADA479633

Entities

People

  • Christopher R. Jones
  • Esteban L. Valles
  • John D. Villasenor
  • Marvin Simon
  • Richard D. Wesel

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Carrier Frequencies
  • Cross Modulation
  • Decoders
  • Decoding
  • Demodulation
  • Electrical Engineering
  • Engineering
  • Errors
  • Feedback
  • Filters
  • Frequency
  • Jet Propulsion
  • Matched Filters
  • Modulation
  • Phase
  • Symbols

Fields of Study

  • Engineering

Readers

  • Computer Programming and Software Development.
  • Positioning, Navigation, and Timing (PNT) Technology.
  • Radar Systems Engineering.