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학술지 Offset and Normalized Min-Sum Algorithms for ATSC 3.0 LDPC Decoder
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저자
명세호, 박성익, 김경중, 이재영, 권선형, 김정창
발행일
201712
출처
IEEE Transactions on Broadcasting, v.63 no.4, pp.734-739
ISSN
0018-9316
출판사
IEEE
DOI
https://dx.doi.org/10.1109/TBC.2017.2686011
협약과제
17HR2100, 초고품질 UHD (UHQ) 전송 기술 개발, 허남호
초록
Offset min-sum algorithm (OMSA) and normalized min-sum algorithm (NMSA) are widely used in commercial LDPC decoders due to low complexity and reasonable performance. In this paper, we provide optimized offset and scaling values for those LDPC decoders based on Advanced Television Systems Committee (ATSC) 3.0 LDPC codes. Furthermore, according to extensive computer simulations, it is shown that the performance of the OMSA and NMSA with the obtained values is close to that of sum-product algorithm, even though the NMSA-based decoder may show a serious error floor due to a channel mismatch effect. Consequently, we recommend that the ATSC 3.0 transmitters use a concatenation of BCH outer code and LDPC inner code as channel coding, considering the use of NMSA for LDPC decoder in ATSC 3.0 receivers.
키워드
ATSC 3.0, LDPC decoder, min-sum, modified min-sum, normalized min-sum, offset min-sum
KSP 제안 키워드
ATSC 3.0, Advanced television systems committee(ATSC), Channel Coding, Computer simulation(MC and MD), Error floor, LDPC codes, LDPC decoder, Min-Sum Algorithm(MSA), Mismatch effect, Sum-product Algorithm, channel mismatch