arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1004.0400cs.ITmath.IT
收藏

高删除概率删除信道容量的一个新界

A new bound for the capacity of the deletion channel with high deletion probabilities

Marco Dalai

摘要:

令$C(d)$为具有删除概率$d$的二进制删除信道的容量。Draman和Mitzenmacher证明了,对于所有的$d$,$C(d)/(1-d)\geq 0.1185 $。Fertonani和Duman最近证明了$\limsup_{d\to 1}C(d)/(1-d)\leq 0.49$。本文证明了$\lim_{d\to 1}C(d)/(1-d)$的存在性,并与$\inf_{d}C(d)/(1-d)$等价。这一结果表明了曲线$C(d)$在区间$d\in [0,1]$内是凸的猜想。此外,使用当前已知的$C(d)$的界限,它导致上限$\lim_{d\to 1}C(d)/(1-d)\leq 0.4143$。

英文摘要:

Let $C(d)$ be the capacity of the binary deletion channel with deletion probability $d$. It was proved by Drinea and Mitzenmacher that, for all $d$, $C(d)/(1-d)\geq 0.1185 $. Fertonani and Duman recently showed that $\limsup_{d\to 1}C(d)/(1-d)\leq 0.49$. In this paper, it is proved that $\lim_{d\to 1}C(d)/(1-d)$ exists and is equal to $\inf_{d}C(d)/(1-d)$. This result suggests the conjecture that the curve $C(d)$ my be convex in the interval $d\in [0,1]$. Furthermore, using currently known bounds for $C(d)$, it leads to the upper bound $\lim_{d\to 1}C(d)/(1-d)\leq 0.4143$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑