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Classification of optimal linear Z(4) rate 1/2 codes of length <= 8

, and . Ars Combinatoria^, (October 2007)

Abstract

In this paper, we classify all optimal linear n, n/2 codes over Z(4) up to length n = 8, and determine the number of optimal codes which are self-dual and formally self-dual. Optimal codes with linear binary images are identified. In particular, we show that for length 8, there are nine optimal codes for the Hamming distance, one optimal code for the Lee distance, and two optimal codes for the Euclidean distance.

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