Christoffel
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Related Articles from SNS
Superdirectivity as a Spectral-Collision RKHS Limit
arXiv:2606.08174v1 Announce Type: new Abstract: We develop a reproducing-kernel Hilbert space interpretation of array superdirectivity based on spectral-collision limits and polynomial jet geometry. As the spacing of an $M$-element linear array tends to zero, the exponential family generated by a linear array undergoes a spectral collision, and the associated finite-dimensional subspaces converge in reproducing kernel to a polynomial jet space. Array gain equals the diagonal evaluation of...