XXXV Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This article presents a system for eye detection using an ensemble of correlation-based filters known as Inner Product Detector (IPD). This work has three main contributions: i) an ensemble classifier with higher accuracy than the original IPD detector, using the bagging algorithm; ii) new discriminant functions based on the ensemble output; and...

This paper presents a new approach for obtaining efficient implementations of Volterra filters. Such an approach is based on exploiting the different significance levels of the branches of reduced-rank Volterra structures, aiming to define individual word sizes for the implementation of each branch. In this way, significant reductions of...

In this work the adaptive tuning of a distributed power control algorithm based on the Distributed- Integral-Derivative DPCA-FM-PID (Distributed Power Control Algorithm-Foschini / Miljanic) controller is proposed through optimization by particle swarm (PSO). Power control is applied to a passive optical network of the new generation 40GEOCDMA- PON...

Este trabalho é um estudo sobre a viabilidade da utilização da tecnologia de identificação por rádio frequência – RFID, para identificação de caprinos e ovinos. O intuito é de melhorar a gestão, qualidade e controle, com foco no mercado de ovinocaprinocultura. Para esse estudo um estaleiro foi equipado com RFID, a fim de investigar a possibilidade...

In underwater acoustic communications, orthogonal frequency-division multiplexing (OFDM) is an alternative to frequency-shift keying (FSK). The key advantage of OFDM scheme is that it provides a significant increase in transmission rate. In this paper, we simulate and compare the performance in terms of bit-error rate (BER) of the OFDM and FSK...

This paper presents a new non-binary finite state Markov channel (FSMC) that captures both the soft-decision information and the temporal correlation of a discrete fading channel. An interative decoding scheme, based on the sumproduct algorithm, is also discussed for joint decoding and channel state estimation. The performance of LDPC codes...

Cerca de 70% da superfície da terra é coberta por água do mar, uma área ainda pouco explorada para fins de comunicação. Desde aplicações comerciais a aplicações militares (envolvendo também a obtenção e preservação de recursos naturais), explorar comunicações submarinas pode ser estratégico e uma vantagem competitiva para países com costa extensa, como...

This article is a study on different strategies for sampling the chirp rate parameter used in the Fan Chirp Transform. In particular, sampling based on the estimation of the parameter’s PDF is proposed; some experiments are performed in order to get some insight on its potentialities, and the corresponding analysis is also presented. The...

This paper presents the results obtained from the conjunction of two techniques proposed for use in modern communication systems: Spatial Modulation (SM) and decoupled signal detection. Theoretical fundamentals of Spatial Modulation signal detection are covered, in addition to signal decoupling techniques that enable the separation at the base...

This work studies the trade-off between spectral ef- ficiency and fairness considering the alocation of radio resources in a multi-user system which considers quality of experience constraints for each user and service. The focus herein is to reduce the non-uniformity among the throughput values achieved by the users, which originate from the...