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arXiv 2202.06758cs.ITmath.IT
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和秩度量下线性化Reed-Solomon码的纠错译码

Error-Erasure Decoding of Linearized Reed-Solomon Codes in the Sum-Rank Metric

Felicitas Hörmann, Hannes Bartz, Sven Puchinger

摘要:

秩和度量的码在多点网络编码、分布式存储和基于码的密码学的差错控制中有着广泛的应用。线性化Reed-Solomon(LRS)码包含Reed-Solomon码和Gabidulin码作为子类,并且在秩和度量上满足Singleton类上界。我们提出了第一个已知的错误擦除解码器的LRS码释放其全部潜力的多拍网络编码。所提出的基于综合征的Berlekamp-Massey类错误擦除解码器可以校正$t_F$全错误、$t_R$行擦除和$t_C$列擦除,直到在和秩度量中的$2t_F + t_R + t_C \leq n-k$,在$\mathbb{F}_{q^m}$中最多需要$\mathcal{O}(n^2)$操作,其中$n$是码的长度,$k$是码的维数。我们展示了如何建议的解码器可以用来纠正错误的总和子空间度量发生在(非相干)多拍网络编码。

英文摘要:

Codes in the sum-rank metric have various applications in error control for multishot network coding, distributed storage and code-based cryptography. Linearized Reed-Solomon (LRS) codes contain Reed-Solomon and Gabidulin codes as subclasses and fulfill the Singleton-like bound in the sum-rank metric with equality. We propose the first known error-erasure decoder for LRS codes to unleash their full potential for multishot network coding. The presented syndrome-based Berlekamp-Massey-like error-erasure decoder can correct $t_F$ full errors, $t_R$ row erasures and $t_C$ column erasures up to $2t_F + t_R + t_C \leq n-k$ in the sum-rank metric requiring at most $\mathcal{O}(n^2)$ operations in $\mathbb{F}_{q^m}$, where $n$ is the code's length and $k$ its dimension. We show how the proposed decoder can be used to correct errors in the sum-subspace metric that occur in (noncoherent) multishot network coding.

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