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  • Research Article
  • Open Access

Multiple-Symbol Decision-Feedback Space-Time Differential Decoding in Fading Channels

EURASIP Journal on Advances in Signal Processing20022002:612697

  • Received: 20 May 2001
  • Published:


Space-time differential coding (STDC) is an effective technique for exploiting transmitter diversity while it does not require the channel state information at the receiver. However, like conventional differential modulation schemes, it exhibits an error floor in fading channels. In this paper, we develop an STDC decoding technique based on multiple-symbol detection and decision-feedback, which makes use of the second-order statistic of the fading processes and has a very low computational complexity. This decoding method can significantly lower the error floor of the conventional STDC decoding algorithm, especially in fast fading channels. The application of the proposed multiple-symbol decision-feedback STDC decoding technique in orthogonal frequency-division multiplexing (OFDM) system is also discussed.


  • space-time differential block code (STDC)
  • flat-fading
  • multiple-symbol detection
  • decision-feedback
  • OFDM

Authors’ Affiliations

Schlumberger Austin Technology Center, Austin, TX, USA
Department of Electrical Engineering, Columbia University, New York, NY 10027, USA


© Liu and Wang 2002