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arXiv 1109.3095cs.ITmath.IT
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基于矩阵幂级数表示的卷积网络编码

Convolutional Network Coding Based on Matrix Power Series Representation

Wangmei Guo, Ning Cai, Qifu Tyler Sun

摘要:

本文通过对局部编码核(LEK)矩阵和全局编码核(GEK)矩阵的矩阵幂级数表示,建立了卷积网络编码的理论基础。从编码的角度来看,如果$K(z)$的常系数矩阵$K_0$是幂零的,则卷积网络码(CNC)的GEK由其LEK矩阵$K(z)$唯一确定。这将简化CNC设计,因为幂零$K_0$足以保证GEK的唯一集合。此外,还讨论了编码拓扑与$K(z)$的关系。从解码的角度来看,主要的主题是证明在信宿$r$处的GEK矩阵$F(z)$的第一$L+1$项足以检查码是否可在$r$处以延迟$L$解码,并且如果是则开始解码。伴随的解码方案避免了整体上处理可能包含无限项的$F(z)$,因此降低了可解码性检查的复杂度。这可能使CNC适用于无线网络。

英文摘要:

In this paper, convolutional network coding is formulated by means of matrix power series representation of the local encoding kernel (LEK) matrices and global encoding kernel (GEK) matrices to establish its theoretical fundamentals for practical implementations. From the encoding perspective, the GEKs of a convolutional network code (CNC) are shown to be uniquely determined by its LEK matrix $K(z)$ if $K_0$, the constant coefficient matrix of $K(z)$, is nilpotent. This will simplify the CNC design because a nilpotent $K_0$ suffices to guarantee a unique set of GEKs. Besides, the relation between coding topology and $K(z)$ is also discussed. From the decoding perspective, the main theme is to justify that the first $L+1$ terms of the GEK matrix $F(z)$ at a sink $r$ suffice to check whether the code is decodable at $r$ with delay $L$ and to start decoding if so. The concomitant decoding scheme avoids dealing with $F(z)$, which may contain infinite terms, as a whole and hence reduces the complexity of decodability check. It potentially makes CNCs applicable to wireless networks.

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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