XXXVIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

The popularization of cloud services and applications has dramatically changed Internet traffic profiles. Such changes have instigated the evolution of the SDN (Software Defined Networks) paradigm, where the data plans and control of the switches are separated, allowing a centralized view of the control and a series of new applications. Two important...

In this paper, the performance of M-ary phase shift keying (MPSK) modulation with imperfect carrier phase recovery over alpha-kappa-mu and alpha-eta-mu fading channels is investigated, for which noisy phase, assumed to be Tikhonov distributed, is considered. Analytical expressions for the exact average symbol error probability (ASEP) as well as their...

This paper investigates the use of the plug-in directed information rate estimator and hypothesis testing to detect causality between discrete-time continuous-state processes. Following our previous work, we have first quantized the continuous-state processes by means of three quantization methods: equidistant, equipopulated and symbolic. Then, we have...

In this paper we study the energy consumption of wireless networked control systems (WNCSs) with time correlation. Our proposal is to minimize the energy consumption, assuming that the actuators may be battery-powered devices, without affecting the control system stability, which may be impacted by communication errors. Firstly, the communication channel...

Neste trabalho, apresentamos construções de reticulados de dimensões 2, 3, 4 e 5 utilizando raízes de polinômios de graus 2, 3, 4 e 5, respectivamente, ou seja, mostramos que através das raízes de polinômios obtemos reticulados nas dimensões 2, 3, 4 e 5. Com esse processo podemos construir reticulados com densidade de centro ótima para qualquer dimensão.

Este trabalho tem como objetivo detectar a doença de Alzheimer em diferentes estágios através de sinais EEG. Potências relativas às frequências convencionais são obtidas dos valores máximo, mínimo e médio de estimativas do espectro de potências da Wavelet Packet. Para cada par de grupos de estudo e eletrodo, uma seleção dos parâmetros é realizada. Os...

This work addresses the problem of radio frequency machine learning-based indoor multifloor positioning, by proposing a two-stage localization scheme. On the first stage, a majority voting committee of Deep Neural Networks (DNN) identifies the floor where the mobile station (MS) is most likely located. On the second stage RF fingerprinting, also known as...

A tecnologia Wi-SUN (Wireless Smart UbiquituosNetwork) permite a construção de redes de comunicações de longo alcance e baixa potência (LPWAN) com base no padrão IEEE 802.15.4g. Oferecendo possibilidades de interoperabilidade entre equipamentos fornecidos por múltiplos fabricantes, Wi-SUN tem encontrado aplicações em diversos campos, tais como...

This work analyzes the use of the K-means clustering algorithm to mitigate nonlinear phase noise in single-span coherent systems, such as long-reach passive optical networks (LR-PONs). Simulations revealed that for a 100-km LRPON employing 16-ary quadrature amplitude modulation (QAM) and considering a 1:64 splitting ratio, the adoption of K-means with...

Optical phased arrays (OPA) are used to improve the radiation characteristics of single-element antennas and allow dynamic control of the radiation pattern. However, the manufacturing constrains of complementary metal oxide semiconductor (CMOS) platform limits the minimum inter-element separation to more than half of the operation wavelength, which in...