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arXiv 2202.03024cs.ITmath.IT
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$k$ -删除/插入通道的输入和输出熵

The Input and Output Entropies of the $k$-Deletion/Insertion Channel

Shubhransh Singhvi, Omer Sabary, Daniella Bar-Lev, Eitan Yaakobi

摘要:

发送字的信道输出熵是可能的信道输出的熵,类似地,接收字的输入熵是所有可能的发送字的熵。这项工作的目标是研究这些熵值的k-删除,k-插入通道,其中正好k个符号被删除,并插入在传输的字,分别。如果所有可能的单词都以相同的概率传输,那么研究输入和输出熵是等效的。对于1-插入和1-删除通道,它被证明,在所有的字与一个固定数量的运行,输入熵最小化的字与一个偏斜的分布,其运行长度和它是最大化的字与一个平衡的分布,其运行长度。在我们的研究结果中,我们建立了一个猜想Atashpendar等人。它声称,对于二进制1-删除,输入熵是最大化的交替的话。这一猜想也验证了2-删除通道,它被证明,常数字与一个单一的运行最小化输入熵。

英文摘要:

The channel output entropy of a transmitted word is the entropy of the possible channel outputs and similarly, the input entropy of a received word is the entropy of all possible transmitted words. The goal of this work is to study these entropy values for the k-deletion, k-insertion channel, where exactly k symbols are deleted, and inserted in the transmitted word, respectively. If all possible words are transmitted with the same probability then studying the input and output entropies is equivalent. For both the 1-insertion and 1-deletion channels, it is proved that among all words with a fixed number of runs, the input entropy is minimized for words with a skewed distribution of their run lengths and it is maximized for words with a balanced distribution of their run lengths. Among our results, we establish a conjecture by Atashpendar et al. which claims that for the binary 1-deletion, the input entropy is maximized for the alternating words. This conjecture is also verified for the 2-deletion channel, where it is proved that constant words with a single run minimize the input entropy.

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。

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