置信传播(belief propagation,BP)算法的计算复杂度较高，且变量节点和校验节点间信息传递的信息可靠，但是迭代的实现，就最大似然算法来说，验证其提高译码性能的特点。

-Belief propagation (belief propagation, BP) higher computational complexity of the algorithm, and reliable information between variable nodes and check nodes of information transmission, but the realization of the iteration, the maximum likelihood algorithm, the verification of its improved decoding performance characteristics.