Space-frequency decision feedback equalizer

Gayathri Kongara, Desmond P. Taylor, Philippa A. Martin

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)


We consider the detection of multiple cochannel single-carrier spatially multiplexed data streams. To this end, we propose a hybrid timefrequency-domain decision feedback equalizer, which performs parallel detection of the data streams. A practical parameter estimation algorithm for these receivers is developed, which estimates the MIMO channel in parallel as a set of effective channel vectors. To avoid interference cancellation, we develop a two-stage frequency-domain (FD) forward section that implements linear cochannel interference (CCI) suppression in cascade with equalization utilizing estimated channel-state information. The resulting receiver architecture outperforms interference-cancellation-based equalizers in the presence of channel estimation errors. Furthermore, all transmitted data streams achieve equal diversity gains.

Original languageEnglish
Article number5737803
Pages (from-to)1626-1639
Number of pages14
JournalIEEE Transactions on Vehicular Technology
Issue number4
Publication statusPublished - May 2011
Externally publishedYes


  • Channel estimation
  • decision feedback equalizer
  • frequency domain equalization
  • multiple-inputmultiple-output (MIMO)

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