XXXVII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

In this paper, the Gini, , and the Theil, , indices, which are used to measure inequality in a population, are jointly analyzed. The Theil index is a measure based on Information Theory, and can vary from 0 to ∞ if there is no limit on the size of the population. The Gini index is limited to the interval [0,1]. In a simple way, it is shown that the Theil...

In wireless networks, channel quality tends to fluctuate regularly and this uncertainty is not captured in deterministic optimization. Recomputing routes whenever the channel condition changes it is computationally expensive and generates route instability that is unsuitable for many applications. This paper presents a new two-stage stochastic...

A sinalização horizontal em pavimentos rodoviários é um importante elemento de segurança que deve apresentar visibilidade tanto diurna como noturna. A visibilidade noturna é avaliada por meio da retrorrefletividade da sinalização e é dependente da quantidade de microesferas de vidro presente na pintura. Desta forma, a quantidade e a distribuição de...

Recently, the exploitation of twisted pairs used as waveguide, as an alternative to the transmission lines mode, has gained prominence, mainly in order to reach the high demands of data. One of the challenges for this implementation is the coupling of the guided modes in the twisted pair, in this context, this paper aims to investigate the coupling of...

The exploration of higher order or guided modes in twisted pair cables, as an alternative to the currently used transmission line mode, was recently proposed with the objective of reaching rates at Tbit/s levels. In this context, this paper evaluates from numerical simulations the use of twisted pair's guided modes. The results are evaluated in terms of...

The recently-proposed sliding Gershgorin radii and centers ratio (SGRCR) detector makes use of multiple sensing rounds using a short window that slides over the full sensing interval, being adequate for detecting short duration signals, like those emitted by pulse radar systems. This articles proposes the sliding Gini index detector (SGID) as a variation...

Este trabalho reporta o impacto do efeito Brillouin (SBS - stimulated Brillouin scattering), bem como a redução do mesmo, em um sistema óptico-wireless amplificado. Tal sistema utiliza 470 m de fibra altamente não-linear (HNLF - highly nonlinear fiber) para estimular o efeito mistura de quatro ondas (FWM - four-wave mixing) e prover ganho de...

This work analyzes the performance in terms of the outage probability for a NOMA-based cooperative scheme, which employs partial relay selection. The considered system model consists of one source, two users accessing the channel using NOMA, and a cluster of full-duplex amplify-and-forward relays. As contributions of this work, exact single-fold integral...

Graph signals (GS) are widespread in many areas of data analysis, such as in social, genetics, and biomolecular networks as well as in several engineering applications. Detecting localized properties of GS using spectral tools while taking into account the underlying graph topology is still an active research topic called vertex-frequency analysis (VFA)....

This paper of Scientific Initiation describes the assembly and testing of a mode-locked laser operating on passive mode in a figure-of-eight cavity. The laser is composed by a single-mode fiber optic ring containing an SOA as medium of gain. Mode-Locking was obtained with MHz repetition rate of the fundamental and harmonic frequencies (Harmonic Mode-Locking).