Transmit-antennae space-time block coding for generalized OFDM in the presence of unknown multipath

Zhiqiang Liu, Georgios B. Giannakis, Sergio Barbarossa, Anna Scaglione

Research output: Contribution to journalArticlepeer-review

133 Scopus citations


Transmit antenna diversity has been exploited recently to develop high-performance space-time coders and simple maximum-likelihood decoders for transmissions over flat fading channels. Relying on block precoding, this paper develops generalized space-time coded multicarrier transceivers appropriate for wireless propagation over frequency-selective multipath channels. Multicarrier precoding maps the frequency-selective channel into a set of flat fading subchannels, whereas space-time encoding/decoding facilitates equalization and achieves performance gains by exploiting the diversity available with multiple transmit antennas. When channel state information is unknown at the receiver, it is acquired blindly based on a deterministic variant of the constant-modulus algorithm that exploits the structure of space-time block codes. To benchmark performance, the Cramér-Rao bound of channel estimates is also derived. System performance is evaluated both analytically and with simulations.

Original languageEnglish (US)
Pages (from-to)1352-1364
Number of pages13
JournalIEEE Journal on Selected Areas in Communications
Issue number7
StatePublished - Jul 2001

Bibliographical note

Funding Information:
Manuscript received October 1, 1999; revised October 5, 2000. This work was supported by the Army Research Office under Grant DAAG55-98-1-0336.


  • Blind channel estimation
  • Multipath fading channels
  • Space-time coding
  • Transmit diversity


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