摘要
当前DVB-T2标准中LDPC译码存在着校验节点和变量节点占用存储空间大、修正的最小和算法复杂度高的缺点。通过只存储校验矩阵Hij=1的校验节点信息和变量节点的后验似然对数比,并对入口参数进行向下取整,节省了存储空间,并在不提高算法复杂度的前提下改进了最小和算法的性能。
Currently, there are disadvantages of checking nodes and variable nodes taking a large of memory and amended Min- Sum algorithm needing higher computation complexity in LDPC decoder. Memory is saved and performance of Min-Sum algorithm is improved without arising computation complexity through only saving cheaking nodes when Hij=1 and posterior likelihood log ratios of variable nodes and rounding down the inlet parameters.
出处
《电视技术》
北大核心
2011年第5期8-9,16,共3页
Video Engineering
