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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium



An Innovation-Based Algorithm for Energy Conservation in Multihop Wireless Sensor Networks

We propose an energy-efficient algorithm for sensing a process f(x,y,t) using a multihop Wireless Sensor Network (WSN). The innovation-based algorithm aims ...

SBrT 2010


On the Effectiveness of Dynamic Spectrum Management Algorithms in xDSL Networks

This work proposes a method for the evaluation of the effectiveness of adopting dynamic spectral management (DSM) algorithms in different DSL scenarios. In...

SBrT 2010


Applying Markov chains to calculate the probability of saturation in digital IIR filters

We propose a new method to model the effect of finite-precision arithmetic in infinite impulse response (IIR) digital filters. As an application, we use th...

SBrT 2010


Electromagnetic Interference Simulation of a Cell Phone in an Aircraft System Using Domain Decomposition Method

Laboratorial experiments to investigate the behavior of numerous embedded avionics installations to onboard electromagnetic interference (EMI) are extremel...

SBrT 2010


Lossless Multi-Grid Chain Code with Optimized Cell Usage for Contour Description of Visual Objects

In the context of object-based image compression, shape encoders that describe the contour of the objects, called chain codes, tend to be more efficient th...

SBrT 2010