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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium



Close Approximations for Daublets and their Spectra

This paper offers a new regard on compactly supported wavelets derived from FIR filters. Although being continuous wavelets, analytical formulation are lac...

SBrT 2010


Demonstrating the security vulnerabilities of the Identity-based Key Management scheme for MANETs

The next generation of mobile communications will merge the well-known infrastructured wireless networks and the infrastructureless mobile ad hoc networks....

SBrT 2010


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


Blocking-Effect Reduction in a Reversed-Complexity Video Codec Based on a Mixed-Quality Framework

This paper presents a blocking-effect reduction in a method for reversed-complexity video codec. We used intra predicted frames encoded at different qualit...

SBrT 2010


EGPRS2 Deployment as a Resource-saving Feature for Voice

EGPRS2 is part of the GERAN evolution standardized in 3GPP GERAN Release 7 and it allows higher throughput rates per timeslot due to the adoption of higher ...

SBrT 2010