| 摘要 |
A device and a method that improve decoding characteristics of an LDPC decoder to which SPA where the equation for the computation of messages is approximated and the number of messages are reduced is applied. A received LDPC code is decoded by repeating the passing of messages between a plurality of check nodes and a plurality of bit nodes corresponding to a check matrix, and messages sent from one of the check nodes to one of the bit nodes out of messages sent from the one of bit nodes to the one of check nodes are weighted at the one of bit nodes so that the longer ago the messages are computed at the one of check nodes, the less influential they become.
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