摘要
低密度校验码(LDPC码)所具有的优越性能和实用价值使其已经成为编码领域研究的热点。然而实际中LD-PC码的应用还有许多具有挑战性的问题,像如何降低译码的复杂度以及如何减少译码所需的大量硬件资源等。基于以上原因,研究一种高性能、低复杂度的软判决译码算法。这种译码算法较常用的硬判决译码算法性能出色,同时较一般的迭代译码算法的收敛速度快,并且可以部分并行译码,需要的存储量很小,能够大幅度降低LDPC译码的硬件实现复杂度,具有实际应用价值。
For high performance and great value, most of scientists on channel -coding have great interested in Low Density Parity - Check Code（LDPC）. But there are many problems unsolved, such as how to reduce the implement complexity,how to cut down the hardware resource and so on. For these reasons,a study on soft- decision decoding arithmetic has been carried out. The arithmetic has high performance,high convergence and so on. The side - by - side decoding can be used to implement the decoder,which makes design has low memory- stored and low hardware implantation complexity. So the design has great value for practice utility.
出处
《现代电子技术》
2008年第18期135-138,共4页
Modern Electronics Technique
关键词
低密度奇偶校验码
图模型
高斯信道
消息传递算法
软判决译码
low density parity - check code
graph model
Girth channel
message passing algorithm
soft - decision decoding
