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arXiv cs/0701146cs.ITmath.IT
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用于AVC的状态约束和列表解码

State constraints and list decoding for the AVC

Anand D. Sarwate, Michael Gastpar

摘要:

研究了状态约束下任意变信道的列表译码问题。结果表明,在$ε$的随机编码容量的AVC与输入相关的状态下,可以实现最大的错误与列表解码,使用列表的大小$O(1/ε)$的速率。在平均误差下,给出了长度为$L$的链表的可达速率域和逆界.这些界限是基于两种不同的对称性概念,一般不一致。给出了示出对于列表大小$L$,容量可以是正的但严格小于随机化编码容量的示例。这种行为与没有状态约束的情况不同。

英文摘要:

List decoding for arbitrarily varying channels (AVCs) under state constraints is investigated. It is shown that rates within $ε$ of the randomized coding capacity of AVCs with input-dependent state can be achieved under maximal error with list decoding using lists of size $O(1/ε)$. Under average error an achievable rate region and converse bound are given for lists of size $L$. These bounds are based on two different notions of symmetrizability and do not coincide in general. An example is given that shows that for list size $L$ the capacity may be positive but strictly smaller than the randomized coding capacity. This behavior is different than the situation without state constraints.

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