A new approach for symbol frame synchronization and carrier frequency estimation in OFDM communications

  • Authors:

  • J. H. Gunther;Hui Liu;A. L. Swindlehurst

  • Affiliations:

  • Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT, USA;-;-

  • Venue:
  • ICASSP '99 Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 05
  • Year:
  • 1999

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Abstract

This work considers the problem of jointly estimating symbol frame boundaries and carrier frequency offsets for orthogonal frequency division multiplexed (OFDM) communications in frequency selective fading environments. Orthogonality between the modulated and virtual carriers over an interference free window of the received signal is used to develop an algorithm for estimating the carrier frequency offset and detecting the beginning of a symbol frame. By using a cyclic prefix to remove interference from neighboring frames, the the method is applicable in the presence of dispersive channels. The main contribution of this work is the joint estimation of the frequency offset and the frame boundary.