| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of having to hold a large amount of memories for storing estimated posteriori probability data in parallel in order to increase a transfer speed in an LDPC (low density parity check code) decoding circuit. SOLUTION: A memory A and a memory B are memories that correspond to a column 901 in which 1 continuously exists in code parts of an inspection matrix, and are composed of high-speed memories or flip-flops to always receive access. A memory C is a memory corresponding to a column 902 in which 1 exists at random in code parts, and a memory D is a memory corresponding to a parity part 1003 in which 1 exists step-wise, each of them being configured by a normal memory. Thus, the number of used memories is reduced by taking into consideration the characteristic of the inspection matrix to devise a method for storing the estimated posteriori probability data. COPYRIGHT: (C)2011,JPO&INPIT
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