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IEICE TRANSACTIONS on Fundamentals

Higher Order Spectral Density Nulls and Spectral Lines

Hiroshi KAMABE

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Summary :

Codes having order-K spectral density nulls, i.e., codes such that the power spectral density of the encoded sequences and its first 2K-1 derivatives vanish at rational submultiples f of the symbol frequency are investigated. Several necessary and sufficient conditions for a code to have an order-K spectral density null at f are given. A lower bound on the minimum Euclidean distance of a code with an integer alphabet and with an order-K spectral density null also is derived. Canonical diagrams for higher order spectral density nulls and nonzero spectral lines are introduced.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E74-A No.9 pp.2531-2539
Publication Date
1991/09/25
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Issue on Information Theory and Its Applications)
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