ML estimation of time and frequency offset in OFDM systems

Research output: Contribution to journalArticle

Abstract

We present the joint maximum likelihood (ML) symbol-time and carrier-frequency offset estimator in orthogonal frequency-division multiplexing (OFDM) systems. Redundant information contained within the cyclic prefix enables this estimation without additional pilots. Simulations show that the frequency estimator may be used in a tracking mode and the time estimator in an acquisition mode.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • OFDM systems, frequency estimation, frequency division multiplexing, multiplexing, maximum likelihood estimation, synchronisation, carrier-frequency offset estimator, acquisition mode, cyclic prefix, tracking, orthogonal frequency-division, tracking mode, symbol-time estimator, maximum likelihood, redundant information, time offset
Original languageEnglish
Pages (from-to)1800-1805
JournalIEEE Transactions on Signal Processing
Volume45
Issue number7
Publication statusPublished - 1997
Publication categoryResearch
Peer-reviewedYes