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Symbol time offset estimation in coherent OFDM systems

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Author

Summary, in English

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.

Publishing year

2002

Language

English

Pages

545-549

Publication/Series

IEEE Transactions on Communications

Volume

50

Issue

4

Document type

Journal article

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • delay estimation
  • communication system
  • multicarrier
  • frequency division multiplexing (OFDM)
  • orthogonal
  • synchronization
  • time estimation

Status

Published

ISBN/ISSN/Other

  • ISSN: 0090-6778