Edson P. da Silva

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In this paper, probabilistic shaping is numerically and experimentally investigated for increasing the transmission reach of wavelength division multiplexed (WDM) optical communication systems employing quadrature amplitude modulation (QAM). An optimized probability mass function (PMF) of the QAM symbols is first found from a modified Blahut-Arimoto(More)
Nonlinear phase noise (NLPN) is studied in an experimental wavelength division multiplexed (WDM) system operating at 256QAM. Extremely narrow linewidth lasers (<1 kHz) at the transmitter and the receiver allow for extracting the phase part of the nonlinear noise in a Raman amplified link. Based on the experimental data, the autocorrelation function of the(More)
Agroindustries are focused in the transformation and processing of raw materials from agricultural source (plant or animal) and contribute to the generation of large amounts of organic residues. These are solid or liquid materials, which are not used in the production chain, and constitute a serious problem because, apparently without viable application,(More)
In recent years, a significant increase in the consumption of “fast foods” and snacks has been observed as a response to the change in lifestyle of the population. Consumers are looking for easy and fast prepared foods, and ease in the acquisition of pre-prepared, frozen, and ready-to-use products in the market. Among these products, stand out the “snacks”,(More)
Received 12/4/2012 Accepted 8/8/2013 (005954) 1 Department Food Science, Federal University of Lavras – UFLA, CP 3037, CEP 37200-000, Lavras, Minas Gerais, Brazil 2 Institute of Agrochemistry and Food Technology – IATA-CSIC, Spain, e-mail: edsonpablos@hotmail.com *Corresponding author Effect of postharvest temperature on the shelf life of gabiroba fruit(More)
We discuss the benefits and limitations of optical time-division multiplexing (OTDM) techniques based on the optical generation of a periodic train of sinc pulses for wavelength-division multiplexing (WDM) transmission at high baud rates. It is shown how the modulated OTDM spectrum bandwidth is related to the optical comb parameters and the pulse shaping of(More)
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