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Publicações

Publicações por CTM

2017

Wi-Green: Optimization of the Power Consumption of Wi-Fi Networks Sensitive to Traffic Patterns

Autores
Rocha, H; Cacoilo, T; Rodrigues, P; Kandasamy, S; Campos, R;

Publicação
2017 15TH INTERNATIONAL SYMPOSIUM ON MODELING AND OPTIMIZATION IN MOBILE, AD HOC, AND WIRELESS NETWORKS (WIOPT)

Abstract
Enterprise Wi-Fi networks have been increasingly considering energy efficiency. In this paper, we present the Wi-Green project wherein we are investigating new techniques and innovative solutions that will allow the minimization of the energy consumption in Wi-Fi networks. In Wi-Green we will consider an enterprise network, in which there is equipment from different vendors, with different ages and different consumption profiles.

2017

UAV Cooperative Perception based on DDS communications network

Autores
Ribeiro, JP; Fontes, H; Lopes, M; Silva, H; Campos, R; Almeida, JM; Silva, E;

Publicação
OCEANS 2017 - ANCHORAGE

Abstract
This paper focus on the use of unmanned aerial vehicle teams for performing cooperative perception using Data Distribution Service (DDS) Network. We develop a DDS framework to manage the incoming and out bounding network traffic of multiple types of data that is exchanged inside the UAV network. Experimental results both in laboratory and in actual flight are presented to help characterize the proposed system solution.

2017

System Design for Wireless Powering of AUVs

Autores
Ressurreicao, T; Goncalves, F; Duarte, C; Goncalves, R; Gomes, R; Santos, R; Esteves, R; Pinto, P; Oliveira, I; Pessoa, LM;

Publicação
OCEANS 2017 - ABERDEEN

Abstract
The present work addresses the design of an electronic system for powering autonomous underwater vehicles (AUVs). We report the study and implementation of a system developed for transmitting and receiving wireless power in water from a docking station to an AUV. A simplified analysis is presented regarding the operation of a class-D power driver in a series-series inductive resonant coupling topology. We further investigate the compromise between link efficiency and power delivery of the system to circumvent the reduced power output capability. Simulation results are provided as well as measurement data validated using circuit prototypes in an experimental setup with a structure similar to the docking station of the AUV filled with salt water.

2017

Performance improvement of a buck converter using Kalman filtering

Autores
Gora, W; Duarte, C; Costa, P; Pereira, A;

Publicação
International Journal of Power Electronics

Abstract

2017

A Study on Load Modulation for Underwater Wireless Power Transfer

Autores
Duarte, C; Goncalves, F; Ressurreicao, T; Gomes, R; Correia, V; Goncalves, R; Santos, R;

Publicação
OCEANS 2017 - ABERDEEN

Abstract
In this work we present a study addressing the load modulation for wireless power transfer in underwater applications. A voltage-mode class-D in a series-series resonance topology is analyzed with simplified equations provided to describe the operation of the wireless power system, including the influence of the load on the primary side. The analysis is validated through simulation results provided for a resistive load modulation using component SPICE models, including the characterization of coupling coils in salt water.

2017

Circuit Design -- Anticipate, Analyze, Exploit Variations

Autores
Stephan Weber; Candido Duarte;

Publicação

Abstract

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