Two-Step Decoding of Binary $2\times 2$ Sum-Rank-Metric Codes

Hao Wu, Bocong Chen, Guanghui Zhang +1

We address an open problem posed by Chen-Cheng-Qi (IEEE Trans.\ Inf.\ Theory, 2025): can the decoding of binary sum-rank-metric codes $\SR(C_1,C_2)$ with $2\times 2$ matrix blocks b…