Coarse frame and carrier synchronization of OFDM systems: A new metric and comparison

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Abstract

We propose a fast and reduced complexity frame and carrier acquisition scheme for orthogonal frequency-division multiplex systems which assumes either a continuous or a burst mode operation in additive white Gaussian noise and frequency-selective channels. By exploiting the repetitive structure of a training symbol, a robust frame synchronizer is obtained and shown to resume to finding the peak of a certain correlation metric that is obtained by invoking maximum likelihood principles. A modified carrier estimator that can correct frequency offsets up to two subcarrier spacings is also proposed. The efficiency of the proposed synchronization algorithms is illustrated by both theoretical performance analysis and computer simulations.

Original languageEnglish
Pages (from-to)1271-1284
Number of pages14
JournalIEEE Transactions on Wireless Communications
Volume3
Issue number4
DOIs
Publication statusPublished - 1 Jul 2004

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Keywords

  • Maximum likelihood (ML) estimation
  • Orthogonal frequency-division multiplexing (OFDM)
  • Synchronization
  • Training symbol

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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