| 摘要 |
FIELD: information technology. ^ SUBSTANCE: disclosed is a novel structure of irregular LDPC codes, which enables to obtain several of codes with different length from a single prototype code with a parity check matrix, given as H=[Hz Hi], where Hz defines a well-known pattern of the corresponding Tanner graph. The parity check matrices for longer codes are obtained as [Hz' "" diag(Hi,Ç,Hi), where Hz' defines a longer zigzag pattern depending on the number of used matrices Hi and "" represents a certain permutation. ^ EFFECT: improved method for encoding and decoding data message for longer code by reusing hardware components designed for decoding a prototype code. ^ 12 cl, 9 dwg |
