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Strictly non-blocking all-optical-cross-connect demonstrator for WDM wavelength...
André, P. S.; Pinto, J. L.; Teixeira, A. J.; Pinto, A. Nolasco; Almeida, T.; Morgado, F.; Pousa, M.In this paper, we assess the design and performances of a strictly non-blocking all-optical cross-connect demonstrator node for WDM wavelength path networks. The all-optical cross-connect (AOXC) prototype was experimentally tested in a small 2 x 2 WDM network with a STM-16 bit stream per channel. The single and cascaded performance of the AOXC was also simulated and its results were validated with the experimen...
Linear Invariant Systems Theory for Signal Enhancement
Tomé, A.M.; Teixeira, Ana Rita; Teixeira, A. J. S.; Miguel, G.; Georgieva, P.; Lang, Elmar W.This paper discusses a linear time invariant (LTI) systems approach to signal enhancement via projective subspace techniques. It provides closed form expressions for the frequency response of data adaptive finite impulse response eigenfilters. An illustrative example using speech enhancement is also presented. ; Este artigo apresenta a aplicação da teoria de sistemas lineares invariantes no tempo (LTI) na anál...
A simple ESR identification methodology for Electrolytic Capacitors conditon mo...
A. Vicente T. leite; Henrique J. A. Teixeira; A. J. Marques Cardoso; Rui Esteves AraújoElectrolytic capacitors are usually used in power electronic systems for smoothing, energy storage or filtering. They have the best overall performance for these objectives being a critical element in the design of these systems, in several applications, with different requirements. But, infortunately, in most cases, they are the most life-limiting device. The expected life of electrolytic capacitors depends on...
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