Optimal binary subspace codes of length 6, constant dimension 3 and minimum distance 4
Optimal binary subspace codes of length 6, constant dimension 3 and minimum distance 4
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DOI:
10.1090/conm/632/12627
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发表时间:
2013-11
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影响因子:
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通讯作者:
T. Honold;Michael Kiermaier;Sascha Kurz
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文献类型:
--
作者:
T. Honold;Michael Kiermaier;Sascha Kurz
It is shown that the maximum size of a binary subspace code of packet length $v=6$, minimum subspace distance $d=4$, and constant dimension $k=3$ is $M=77$; in Finite Geometry terms, the maximum number of planes in $\operatorname{PG}(5,2)$ mutually intersecting in at most a point is $77$. Optimal binary $(v,M,d;k)=(6,77,4;3)$ subspace codes are classified into $5$ isomorphism types, and a computer-free construction of one isomorphism type is provided. The construction uses both geometry and finite fields theory and generalizes to any $q$, yielding a new family of $q$-ary $(6,q^6+2q^2+2q+1,4;3)$ subspace codes.