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Sociedade Brasileira de Telecomunicações


HMM Modeling of Burst Error Channels by Particle Swarm Optimization of the Likelihood Function

This paper proposes a new strategy for fitting Hidden Markov Models to error processes of channels with memory. Our approach consists of obtaining the anal...

SBrT 2010


An Approach for Solving the Base Station Placement Problem using Particle Swarm Intelligence

A large amount of studies deals with the base station placement problem (BSP), but few studies involve the selection of base stations to meet a set of user...

SBrT 2010


An Evaluation of the Effects of Propagation Channels on the Performance of WiMAX (IEEE 802.16-2004)

The purpose of this paper is to evaluate the performance of fixed-WiMAX (IEEE 802.16-2004) operating in seven propagation channel models, by implementing a W...

SBrT 2010


Analysis of multi-homed SCTP and delay-centric transmission for VoIP traffic in lossy networks

Nowadays a number of Internet access possibilities can be simultaneously available to fixed or mobile users. Adequate selection of the most appropriate comm...

SBrT 2010


Interference Analysis of Coexistence Scenarios in TV White Spaces

Broadband wireless systems in TV White Spaces have gained considerable attention since FCC started the process in 2004 and later 2008 published the first r...

SBrT 2010