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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium

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...

SBrT 2010

A ew Multifractal Traffic Model and Its Impacts on Buffer Queueing Performances

In this paper, we propose a new analytical expression for estimating byte loss probability at a single server queue with multi-scale traffic arrivals using...

SBrT 2010

A Fingerprint-based Access Control using Principal Component Analysis and Edge Detection

This paper presents a novel approach for deciding on the appropriateness or not of an acquired fingerprint image into a given database. The process begins...

SBrT 2010

A First Glance Comparison of Next and New Generation Network Approaches

ext Generation etworks ( xG ), as pursued by international standards development organizations, represent the telecommunication operator approach to ...

SBrT 2010

A Linearly Constrained IQRD-RLS Algorithm for Blind Multiuser Detection in CDMA Systems

In this paper we propose an inverse QR decomposition based recursive least squares algorithm (IQRD-RLS) for the linearly constrained minimum variance (LCMV)...

SBrT 2010