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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium



Classification of voice aging based on the glottal signal

Classification of voice aging has many applications in health care and geriatrics. This work focuses on finding the most relevant parameters to classify voi...

SBrT 2010


Logical Operations by Pulse Modulation in Nonlinear Directional Coupler

Implementation of logical gates by pulse modulation in nonlinear fiber directional coupler is investigated numerically. We consider pulses from an optical ...

SBrT 2010


Controlling the Peak-to-Average Power Ratio in the Downlink of WiMAX Systems

It is well known that one of the main implementation issues in multicarrier modulation schemes, like OFDM, is their high peak-to-average power ratio (PAPR)....

SBrT 2010


Optimized Blind Algorithms for Widely Linear Beamforming

The use of array beamforming in modern wireless communication systems has been increasingly investigated, due to their potential in rejecting interference ...

SBrT 2010


Enhancement of Data Rate for User Cooperation

In this paper, we propose a different scheme based on user cooperation diversity, in which we obtain an increase in the data rate. In particular, we presen...

SBrT 2010