Belief propagation over SISO/MIMO frequency selective fading channels

Mustafa N. Kaynak, Tolga M. Duman, Erozan M. Kurtas

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


In this letter, we propose an iterative belief propagation (BP) channel detector (equalizer) over single-input single-output (SISO) and multiple-input multiple-output (MIMO) frequency selective fading channels as an alternative to the typically used maximum a-posteriori (MAP) or maximum likelihood (ML) detectors. The proposed detector has a parallel structure, resulting in fast hardware implementations. Moreover, BP detector is less complex than the MAP detector and it has a short decoding delay. We analyze the bit error rate and the mutual information and show that, over frequency selective fading channels, the proposed BP detector achieves a near-optimal performance, even in the presence of the length 4 cycles in the corresponding channel factor graph.

Original languageEnglish (US)
Pages (from-to)2001-2005
Number of pages5
JournalIEEE Transactions on Wireless Communications
Issue number6
StatePublished - Jun 2007


  • Belief propagation
  • Channel detection
  • Frequency selective fading channels
  • MIMO systems
  • Mutual information

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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