Carrier and Timing Synchronization of BPSK via LDPC Code Feedback

Abstract

In traditional receiver architectures, symbol acquisition and tracking are performed using phase lock techniques that are independent of the channel-code decoding process. In previous research [Lee, Valles, Villasenor & Jones, 2006], feedback from the constraint-node side of a bi-partite graph is used to estimate symbol frequency and timing offset in a baseband pilotless transmission. Soft information feedback from an LDPC decoder is used to recover carrier phase information under the assumption of perfect symbol timing in [Simon, Valles, Jones, Wesel, & Villasensor, 2006]. In this paper we address the problem of joint carrier-phase and symbol timing recovery. The proposed system is able to perform within 0.3 [dB] of the code performance with perfect knowledge of carrier phase and symbol timing.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2006
Accession Number
ADA479472

Entities

People

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

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acquisition
  • Algorithms
  • Circuits
  • Decoders
  • Decoding
  • Detectors
  • Electrical Engineering
  • Engineering
  • Errors
  • Estimators
  • Feedback
  • Filters
  • Frequency
  • Jet Propulsion
  • Random Walk
  • Recovery
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Educational Psychology
  • Radio communications and signal processing.