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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium



System-Level Analysis of Outer Loop Link Adaptation on Mobile WiMAX Systems

Link adaptation is a process of paramount importance to optimize the performance of wireless communication systems. However, standardization committees have ...

SBrT 2010


Synchronization of Legacy 802.11a/g Devices Operating in IEEE 802.11n Networks

It is investigated the performance of legacy IEEE 802.11a time synchronization algorithms when the synchronization preamble is transmitted by IEEE 802.11n ...

SBrT 2010


SUI Propagation Model Tuning from Collected Data in Fixed Wireless Systems at Arboreous Environments on 5.8 GHz Band

This paper presents an tuning in SUI Propagation Model through the least squares algorithm. Data measurements were carried out in arboreous environments, i...

SBrT 2010


Speaker Recognition Using Dynamic Features and The Null Space Combination of Classifiers in The Sub-band Domain

This paper investigates the inclusion of dynamic features in the input vectors used by the multiple classification scheme which employ the null space to co...

SBrT 2010


Single shift-register for RFID tag secrecy

In this paper we present a new privacy scheme against passive adversaries based on the message modulation instead of classical cryptographic models for low...

SBrT 2010