G-projectable and Λ-projectable binary linear block codes
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The binary [24,12,8] Golay code has projection O onto the quaternary [6,3,4] hexacode  and the [32,16,8] Reed-Muller code has projection E onto the quaternary self-dual [8,4,4] code . Projection E was extended to projection G in . In this paper we introduce a projection, to be called projection Λ, that covers projections O, E and G. We characterise G-projectable self-dual codes and Λ-projectable codes. Explicit methods for constructing codes having G and Λ projections are given and several so constructed codes that have best known optimal parameters are introduced.
KeywordsLinear block code Projection on F_4 G-Projection Λ-Projection
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