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Consider the first-order advanced difference equation of the form ∇x(n) − p(n)x(µ(n)) = 0, n ≥ 1, [∆x(n) − p(n)x(ν(n)) = 0, n ≥ 0], where ∇ denotes the backward difference operator ∇x(n) = x(n) − x(n − 1), ∆ denotes the forward difference operator ∆x(n) = x(n + 1) − x(n), {p(n)} is a sequence of nonnegative real numbers, and {µ(n)} [{ν(n)}] is a sequence of… (More)

Frequency bands well above 10GHz are of primary importance for current and, more importantly, future user oriented satellite communication networks. In this course, well known rain fade mitigation techniques such as site diversity are reviewed and considered for use in a different context. This paper extends previous analytical methodologies to the case of… (More)

- V. VITA, A. VITAS, G. E. CHATZARAKIS
- 2011

Iterative learning control (ILC) is used to control systems that operate in a repetitive mode, improving tracking accuracy of the control by transferring data from one repetition of a task, to the next. In this paper an optimal iterative learning algorithm for discrete linear systems is designed and implemented. The design and implementation that have been… (More)

- George E. Chatzarakis, István Győri, Hajnalka PéicsB, Ioannis P. Stavroulakis, Leonid Berezansky, G. E. Chatzarakis
- 2015