Abstract
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 language | English (US) |
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Pages (from-to) | 2001-2005 |
Number of pages | 5 |
Journal | IEEE Transactions on Wireless Communications |
Volume | 6 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2007 |
Keywords
- 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