文章基本信息

标题：Complexity-Reduced Algorithms for LDPC Decoder for DVB-S2 Systems
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作者：Choi, Eun-A ; Jung, Ji-Won ; Kim, Nae-Soo 等
期刊名称：ETRI Journal
印刷版ISSN：1225-6463
电子版ISSN：2233-7326
出版年度：2005
卷号：27
期号：5
页码：639-639
语种：English
出版社：Electronics and Telecommunications Research Institute
摘要：This paper proposes two kinds of complexity-reduced algorithms for a low density parity check (LDPC) decoder. First, sequential decoding using a partial group is proposed. It has the same hardware complexity and requires a fewer number of iterations with little performance loss. The amount of performance loss can be determined by the designer, based on a tradeoff with the desired reduction in complexity. Second, an early detection method for reducing the computational complexity is proposed. Using a confidence criterion, some bit nodes and check node edges are detected early on during decoding. Once the edges are detected, no further iteration is required; thus early detection reduces the computational complexity.
关键词：LDPC codes;low complexity;early detect algorithm