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New binary sequences of period N = 4(2m - 1) for even m ges 4 are found, where the sequences are described by a 4 X (2m - 1) array structure. The new sequences are almost balanced and have four- valued autocorrelation, i.e., {N, 0, plusmn4}, which is optimal with respect to autocorrelation magnitude. The complete autocorrelation distribution and the exact linear complexity of the sequences are mathematically...
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