A check node processing means generates second intermediate data for updating the data stored in the first storage means on the basis of the result after the first intermediate data and received data are added.
A control unit (42) adjusts the magnitude of a normalizing constant to be used when updating the extrinsic value ratio in the check node processing according to the magnitude of the prior value ratio updated in the variable node processing.
In accordance with the inferred state of the communication pathway, a selection unit (54) selects a normalization constant from among a pre-defined plurality of normalization constants that are to be used when updating an external value ratio on the basis of a prior value ratio during check node processing by a min-sum algorithm.
The data conversion means updates the data stored in the second storage means by using the first intermediate data and updates the data stored in the first storage means by using the second intermediate data generated by the check node processing means.
A min-sum processing unit (46) executes a min-sum algorithm for the data that has been input, thereby alternately executing check node processing for updating an extrinsic value ratio on the basis of a prior value ratio, and variable node processing for updating the prior value ratio on the basis of the extrinsic value ratio.
The variable node processing unit (104), edge coefficient processing unit (106), and check node processing unit (107) perform iteration processing using the log-Fourier domain probability vector.
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Synonyms and analogies of "check node processing" in English