Duadic Z4-Codes
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Philippe Langevin; Patrick Solรฉ
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Article
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2000
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Elsevier Science
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English
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The structure of abelian Z -codes (and more generally Z N K -codes) is studied. The approach is spectral: discrete Fourier transform and idempotents. A criterion for self-duality is derived. An arithmetic test on the length for the existence of nontrivial abelian self-dual codes is derived. A natura