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

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...

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Bibliographische Detailangaben
Hauptverfasser: NO JONGSEON, KIM SUIL, KIM CHANGI, AHN JAEHA
Format: Patent
Sprache:eng ; kor
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Zusammenfassung: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. 본 발명은 LDPC 부호 설계 기법에 관한 것이다. 본 발명에 따른 블록 간섭 및 블록 페이딩에 강인한 고부호율 프로토그래프(protograph) 기반 LDPC 부호 설계 기법은, 하나의 홉(hop) 내에서 부호어가 발생하지 않도록 하는 기초 행렬의 구조를 산출하는 단계; 채널 초기 값 중 하나의 홉에 해당하는 위치의 값을 변형한 PEXIT 알고리즘을 통해, 최적화된 기초 행렬을 산출하는 단계; 상기 산출한 최적화된 기초 행렬로부터, 리프팅(lifting)을 통해 패리티 검사 행렬을 도출하는 단계; 및 상기 패리티 검사 행렬을 따르는 LDPC 복호기 및 부호기를 설계하는 단계;를 포함한다.