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

被引:5
|
作者
Walsh, John MacLaren [1 ]
Regalia, Phillip Allan [2 ]
机构
[1] Drexel Univ, Philadelphia, PA 19104 USA
[2] Catholic Univ Amer, Washington, DC 20064 USA
基金
美国国家科学基金会;
关键词
Belief propagation; factor graphs; probabilistic decoding; turbo decoding; iterative decoding; PARITY-CHECK CODES; TURBO-CODES; FREE-ENERGY; DUALITY;
D O I
10.1109/TCOMM.2010.082010.080138
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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.
引用
收藏
页码:2753 / 2758
页数:6
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