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...
- Liselene de Abreu Borges
- Miguel Arjona Ramírez
- Water Leak Detection
- SVM
- AR
- PCA
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...
- José Carlos M. Bermudez
- Fernando G. Almeida Neto
- Vítor H. Nascimento
- Saturation
- IIR filters
- Markov chains
- finite precision arithmetic
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...
- Ciro A. Pitz
- Marcelo G. Vanti
- Orlando J. Tobias
- Rui Seara
- Adaptive antenna arrays
- beamforming algorithm
- duality approach
- LMS-based algorithm
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...
- Rodolfo W. L. Coutinho
- Vitor L. Coelho
- Joao C. W. A. Costa
- Glaucio H. S. Carvalho
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...
- Ian Alves Ulian
- André Noll Barreto
- OFDM
- PAPR
- non-linear power amplifier
- total degradation
- channel coding
SBrT 2010