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Symbol time offset estimation in coherent OFDM systems

Publiceringsår: 2002
Språk: Engelska
Sidor: 545-549
Publikation/Tidskrift/Serie: IEEE Transactions on Communications
Volym: 50
Nummer: 4
Dokumenttyp: Artikel i tidskrift
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.


This paper presents a symbol time offset estimator for coherent orthogonal frequency division multiplexing (OFDM) systems. The estimator exploits both the redundancy in the cyclic prefix and available pilot symbols used for channel estimation. The estimator is robust against frequency offsets and is suitable for use in dispersive channels. We base the estimator on the maximum-likelihood estimator for the additive white Gaussian noise channel. Simulations for an example system indicate a system performance as close as 0.6 dB to a perfectly synchronized system.


  • Electrical Engineering, Electronic Engineering, Information Engineering
  • delay estimation
  • communication system
  • multicarrier
  • frequency division multiplexing (OFDM)
  • orthogonal
  • synchronization
  • time estimation


  • ISSN: 0090-6778

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