Abstract
A (2n, k, l, c, d) DC free binary block code is a code of length 2n, constant weight n, 2/sup k/ codewords, maximum runlength of a symbol l, maximum accumulated charge c, and minimum distance d. The purpose of this code is to achieve DC freeness and error correction at the same time. The goal is to keep the rate k/2n and d large and l and c small. Of course, these are conflicting goals. H.C. Ferreira (IEEE Trans. Magn., vol.MAG-20, no.5, p.881-3, 1984) presented a (16, 8, 8, 5, 4) DC free code. Here, a (16, 9, 6, 5, 4) DC free code is presented. Easy encoding and decoding algorithms are also given.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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