A Barker array is a two-dimensional array with elements +/-1 such that all out-of-phase aperiodic autocorrelation coefficients are 0, 1, or -1. No s x t Barker array with s, t > 1 and (s, t) not-equal (2, 2) is kno...
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A Barker array is a two-dimensional array with elements +/-1 such that all out-of-phase aperiodic autocorrelation coefficients are 0, 1, or -1. No s x t Barker array with s, t > 1 and (s, t) not-equal (2, 2) is known, and it is conjectured that none exists. Nonexistence results for a class of arrays that includes Barker arrays have been previously given, in the case where st is even. We prove nonexistence results for this class of arrays in the caw where st is odd, providing further support for the Barker array conjecture.
A Barker array is a two-dimensional array with elements +/-1 such that all out-of-phase aperiodic autocorrelation coefficients are 0, 1, or -1. No s x t Barker array with s, t > 1 and (s, t) not-equal (2, 2) is kno...
详细信息
A Barker array is a two-dimensional array with elements +/-1 such that all out-of-phase aperiodic autocorrelation coefficients are 0, 1, or -1. No s x t Barker array with s, t > 1 and (s, t) not-equal (2, 2) is known, and it is conjectured that none exists. A class of arrays that includes Barker arrays is defined. Nonexistence results for this class of arrays in the case st even, providing support for the Barker array conjecture, are proved. Several connections, in the case st even, between this class of arrays and perfect, quasi-perfect, and doubly quasi-perfect binary arrays are demonstrated.
The existence and stability of discrete breathers is studied theoretically for a model magnetic metamaterial composed of a periodic binary array of split-ring resonators with resonance frequency mismatch. It is demons...
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The existence and stability of discrete breathers is studied theoretically for a model magnetic metamaterial composed of a periodic binary array of split-ring resonators with resonance frequency mismatch. It is demonstrated that breathers can be excited spontaneously by frequency chirping of the driving field, a method that is well suited for experiments. (C) 2010 Elsevier B.V. All rights reserved.
The existence and stability of discrete breathers is studied theoretically for a model magnetic metamaterial composed of a periodic binary array of split-ring resonators with resonance frequency mismatch. It is demons...
详细信息
The existence and stability of discrete breathers is studied theoretically for a model magnetic metamaterial composed of a periodic binary array of split-ring resonators with resonance frequency mismatch. It is demonstrated that breathers can be excited spontaneously by frequency chirping of the driving field, a method that is well suited for experiments. (C) 2010 Elsevier B.V. All rights reserved.
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