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On the Relationship Between Belief Propagation Decoding and Joint Maximum Likelihood Detection

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2 Author(s)
John MacLaren Walsh ; Drexel University, Philadelphia, PA ; Phillip Allan Regalia

Belief propagation, via a novel reinterpretation of the Bethe free energy's pseudo-dual, is shown to be related to a novel relaxation of maximum likelihood detection via a constrained optimization. The conventional maximum likelihood detection falls out for a zero constraint, and belief propagation's fixed points are obtained for other constraint values.

Published in:

IEEE Transactions on Communications  (Volume:58 ,  Issue: 10 )