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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium

Lossless Multi-Grid Chain Code with Optimized Cell Usage for Contour Description of Visual Objects

In the context of object-based image compression, shape encoders that describe the contour of the objects, called chain codes, tend to be more efficient th...

SBrT 2010

A Low-Cost Implementation of High-Order Square M-QAM Detection/Demodulation in a FPGA Device

This paper outlines a low-cost technique for detection/demodulation of high-order square M-ary quadrature amplitude modulation (M-QAM), M = 4, 16, 64, 256,...

SBrT 2010

Analysis of DOP in the Presence of PMD and PDL for RZ/RZ-DPSK Signals in High-Rate Optical Transmission Link

This work analyzed numerically the relationship between DOP, PMD and PDL dispersion effects in high-rate optical communication systems for differential pha...

SBrT 2010

Comparative Analysis of PMD and PDL on DOP in Optical Communication Systems for NRZ, RZ and CSRZ Signals

This paper presents a numerical analysis of the dispersive effects of light polarization in optical fibers. This study analyzed the behavior of the degree ...

SBrT 2010

Rounded Patch Antenna with T-Shaped Probe Feeding and Shorted Wall

In this work, a modified patch antenna with broad bandwidth and small size is proposed and investigated. Instead of rectangular patch of a known antenna we...

SBrT 2010