The Zak transform is used for generalizing a sampling theorem of G. Walter for wavelet subspaces. Cardinal series based on signal samples f(a + n), n E 2 with a possibly unequal to 0 (Walterâ€™s case)â€¦ (More)

New Bessel-series representations for the calculation of the diffraction integral are presented yielding the point-spread function of the optical system, as occurs in the Nijboer-Zernike theory ofâ€¦ (More)

This paper presents an adaptive algorithm for the restoration of lost sample values in discrete-time signals that can locally be are that the positions of the unknown samples should be known and thatâ€¦ (More)

The Capetanakisâ€“Tsybakovâ€“Mikhailov contention tree algorithm provides an efficient scheme for multiaccessing a broadcast-communication channel. This paper studies statistical properties ofâ€¦ (More)

It is shown that there is a trade-off between the smoothness and decay properties of the dual functions, occurring in the lattice expansion problem. More precisely, it is shown that if g and g areâ€¦ (More)

Random-access networks may exhibit severe unfairness in throughput, in the sense that some nodes receive consistently higher throughput than others. Recent studies show that this unfairness is due toâ€¦ (More)

Gabor theory is concerned with expanding signals as linear combinations of elementary signals that are obtained from a single function (the window) by shifting it in time and frequency over integerâ€¦ (More)