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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium

Acoustic Water Leak Detection System

This article presents an acoustic water leak detection system. It shows all the stages for doing acoustic leak signal processing and classification. The te...

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

Adaptive Beamforming for Antenna Arrays in Cellular Systems Based on a Duality Between Uplink and Downlink Channels

This paper presents a beamforming algorithm for antenna arrays attending to both power and signal-tointerference-plus-noise (SNIR) ratio constraints. The pr...

SBrT 2010

Optimal Policy for Initial Selection Radio Access Technology in Next Generation Wireless Networks

In this paper, we propose an optimal Joint Call Admission Control (JCAC) in next generation wireless networks, where different radio access technologies (R...

SBrT 2010

On the Impact of Non-Linear High Power Amplifiers on Coded OFDM

The high peak-to-average power ratio (PAPR) is one of the main disadvantages of OFDM systems, which reduces the transmission efficiency with non-linear pow...

SBrT 2010