Papers › Decoding High-Order Interleaved Rank-Metric Codes
Decoding High-Order Interleaved Rank-Metric Codes
Sven Puchinger, Julian Renner, Antonia Wachter-Zeh
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This paper presents an algorithm for decoding homogeneous interleaved codes of high interleaving order in the rank metric. The new decoder is an adaption of the Hamming-metric decoder by Metzner and Kapturowski (1990) and guarantees to correct all rank errors of weight up to d-2 whose rank over the large base field of the code equals the number of errors, where d is the minimum rank distance of the underlying code. In contrast to previously-known decoding algorithms, the new decoder works for any rank-metric code, not only Gabidulin codes. It is purely based on linear-algebraic computations, and has an explicit and easy-to-handle success condition. Furthermore, a lower bound on the decoding success probability for random errors of a given weight is derived. The relation of the new algorithm to existing interleaved decoders in the special case of Gabidulin codes is given.
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