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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium



Removing Back-to-Front Interference in Documents with Mirror Filtering

Very often documents are written on both sides on translucent paper making visible the ink from one side on the other. This artifact was called “back-to-fr...

SBrT 2010


Reduced Complexity Viterbi Decoding Based on the M-Algorithm and the Minimal

In this paper we propose sub-optimum, reduced complexity decoding algorithms for convolutional codes. The algorithms are based on the minimal trellis repre...

SBrT 2010


Rank codes – the State of Art

The State of Art for rank codes is presented. The theory and applications are considered.

SBrT 2010


Quaternary LDPC Codes on OFDM Systems

This paper evaluates the performance of quaternary LDPC codes associated to OFDM systems. The LDPC codes are based on a ring Z4 of integers modulo-4. Each...

SBrT 2010


Quantum Permanent Compromise Attack to Blum-Micali Pseudorandom Generator

This paper presents a quantum permanent compromise attack to the Blum-Micali pseudorandom generator whose security is based on the assumption of intractabil...

SBrT 2010