Determining and Approaching Achievable Rates of Binary Intersymbol Interference Channels Using Multistage Decoding
Determining and Approaching Achievable Rates of Binary Intersymbol Interference Channels Using Multistage Decoding
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使用多级解码确定和接近二进制码间干扰信道的可实现速率
DOI：
10.1109/tit.2007.892778
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发表时间：
2007
影响因子：
2.5
通讯作者：
P. Siegel
中科院分区：
文献类型：
--
作者：
J. Soriaga;H. Pfister;P. Siegel
通过研究固定遍频信道上多级解码系统的可实现速率，我们推导了独立均匀分布（i.u.d）输入所对应的互信息速率的下界，也称为i.u.d信息速率。对于二进制码间干扰（ISI）信道，我们表明这些边界随着解码级数的增加而变得紧密。我们的分析侧重于解码每个阶段的边际条件输出密度，提供了与每个阶段相对应的信息率。这些速率是基于低密度奇偶校验（LDPC）码和消息传递的多级编码方案设计的基础，与多级解码方法相结合，可以实现二进制ISI信道的i.u.d信息速率。我们给出了磁记录中常用的通道模型的构造实例。这些实例表明，即使对于少量的解码阶段，该技术也是非常有效的
By examining the achievable rates of a multistage decoding system on stationary ergodic channels, we derive lower bounds on the mutual information rate corresponding to independent and uniformly distributed (i.u.d.) inputs, also referred to as the i.u.d. information rate. For binary intersymbol interference (ISI) channels, we show that these bounds become tight as the number of decoding stages increases. Our analysis, which focuses on the marginal conditional output densities at each stage of decoding, provides an information rate corresponding to each stage. These rates underlie the design of multilevel coding schemes, based upon low-density parity-check (LDPC) codes and message passing, that in combination with multistage decoding approach the i.u.d. information rate for binary ISI channels. We give example constructions for channel models that have been commonly used in magnetic recording. These examples demonstrate that the technique is very effective even for a small number of decoding stages
影响因子：
2.5
作者：
Richardson, TJ;Urbanke, RL
通讯作者：
Urbanke, RL