Skip to content

Sociedade Brasileira de Telecomunicações


Control in Trellis Codes produced by Finite State Machines with Information Group Zp

A trellis code is the image of a signal mapper from a time invariant group code produced by a Finite State Machine, FSM. Group codes can be described as dy...

SBrT 2010


Electromagnetic Interference Simulation of a Cell Phone in an Aircraft System Using Domain Decomposition Method

Laboratorial experiments to investigate the behavior of numerous embedded avionics installations to onboard electromagnetic interference (EMI) are extremel...

SBrT 2010


Frequency-Domain Blind Source Separation employing a Non-Uniform DFT

Blind source separation (BSS) techniques have been extensively investigated in the last years, due to their large number of applications. There are two main...

SBrT 2010


Quaternary LDPC Codes on OFDM Systems

This paper evaluates the performance of quaternary LDPC codes associated to OFDM systems. The LDPC codes are based on a ring Z4 of integers modulo-4. Each...

SBrT 2010


An Application Server Approach for Number Portability in IMS networks

Number portability (NP) is an important requirement present in most telephony networks. Typically, NP is regulated by local legislation and is inherently a...

SBrT 2010