In this paper, for any fixed integer $q>2$, we construct $q$-ary codes correcting a burst of at most $t$ deletions with redundancy $\log n+8\log\log n+o(\log\log n)+\gamma_{q,t}$ bits and near-linear encoding/decoding complexity, where $n$ is the message length and $\gamma_{q,t}$ is a constant that only depends on $q$ and $t$. In previous works there are constructions of such codes with redundancy $\log n+O(\log q\log\log n)$ bits or $\log n+O(t^2\log\log n)+O(t\log q)$. The redundancy of our new construction is independent of $q$ and $t$ in the second term.
翻译:本文针对任意固定整数$q>2$,构造了能纠正至多$t$次突发删除的$q$进制码,其冗余量为$\log n+8\log\log n+o(\log\log n)+\gamma_{q,t}$比特,且具有近线性编码/解码复杂度,其中$n$为消息长度,$\gamma_{q,t}$为仅依赖于$q$和$t$的常数。已有工作中此类码的冗余量构造为$\log n+O(\log q\log\log n)$比特或$\log n+O(t^2\log\log n)+O(t\log q)$。本文新构造的冗余量在第二项中与$q$和$t$无关。