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Sociedade Brasileira de Telecomunicações

WSN Coverage Improvement with ROF in Bus Topology for Smart Cities

This work proposes an experimental coverage evaluation of a Wireless Sensor Network (WSN) connected with Radio-over-Fiber (RoF) network operating as system b...

SBrT 2018

Wireless Physical-layer Security Using Precoding and an Active Eavesdropper

The wireless physical layer security can assist traditional encryption mechanisms by generating the keys, for instance. However, some techniques allow hiding...

SBrT 2017

Wireless Communications in the Undergrad Curriculum

The field of wireless communications even in its restriction to cellular systems continues to expand rapidly. As such, its introduction in the undergraduat...

SBrT 2013

WiFi Multifloor Indoor DCM Positioning

Database correlation methods (DCM) are used to locate mobile stations (MS’s) in wireless networks. A target radiofrequency (RF) fingerprint - measured by th...

SBrT 2013

Warped Discrete S-Transform

This work introduces the warped discrete-time S- transform and the warped discrete S-transform to improve th e time frequency representation of the well-k...

SBrT 2015