LDPC The Method of Protograph LDPC codes Construction Robust to Block Interference and Fading

摘要

The present invention relates to a scheme for designing a low-density parity-check (LDPC) code. According to the present invention, an LDPC code design scheme, which is a high-code protograph based robust against block interference and block fading, comprises the steps of: calculating a structure of a fundamental matrix that prevents a codeword from occurring within one hop; calculating an optimized fundamental matrix through a photograph extrinsic information transfer (PEXIT) algorithm which transforms a value of position corresponding to one hop of channel initial value; deriving a parity check matrix from the calculated optimized fundamental matrix through lifting; and designing an LDPC decoder and encoder conforming the parity check matrix.