XXX Simpósio Brasileiro de Telecomunicações

Use of Photonic Switching in Optical Networks seems to be one of the best solutions for traffic optimization in Metropolitan Access. Here we propose optical packet/burst switching (OPS/OBS) networks as a future-proof solution for high-throughput in the highly variable traffic pattern of the metro-access. Through analytic modeling and...

This work proposes a service discovery protocol based on localization to MANETs. This protocol proposes a service selection mechanism with data fusion that dynamically selects the best resource providers during the reply transmissions in order to reduce the energy consumption and improve the network lifetime. Another issue addressed in this work is...

Long Term Evolution (LTE)-Advanced has regarded both Coordinated Multi-Point (CoMP) and Multiple Input Multiple Output (MIMO) technologies as an efficient means of meeting the International Mobile Telecommunications (IMT)-Advanced requirements. In this context, efficient Radio Resource Allocation (RRA) strategies are required to exploit the...

This paper shows a design and implementation of a radix-4 FFT in FPGA using a Xilinx Spartan-6. The decimation in time equations are reviewed and in sequence several FPGA modules are presented according to algorithm architecture looking for optimization in execution time and occupied device area. Several tests were performed in order to validate...

This work analyzes, through computer simulations, the effectiveness of the weigthed erasure decoding (WED) algorithm applied to unequal error protection block codes using binary transmission over an additive white Gaussian noise channel. The performance of the WED algorithm is compared to maximum likelihood decoding one and an evaluation of the...

In this work we present a generalization of the so called Construction B of [3] for classes of q-ary codes with q 2 N and also some relations between the Constructions A and B. We show that the lattice obtained from a q-ary code via Construction B has qDn as sub-lattice and can alternatively be viewed as the Construction A of a 2q-ary code. Finally,...

The growth of mobile communication systems with high data rate capacity and multiple users is pushing the researches about techniques that presents high spectrum efficiency. OFDMA is already a reality in many advanced mobile communication systems, such as LTE, IEEE802.16 and IEEE802.22. Nevertheless, the efficiency of the OFDMA technique depends on...

This paper presents the implementation of a computational tool that performs the calculation of the current distribution in wire antennas using the Method of Moments (MoM). For this purpose, different approaches were used: the Point-Matching Method and the Galerkin Method. Both were implemented in Matlab R . To demonstrate the use of the tool,...

This paper presents an evaluation of available technologies to implement home networking infrastructure for IPTV systems. The study was made using using legacy cabling technologies, because most the residential facilities do not adapt to the Brazilian standards for structured cabling. Quantitative tests were performed in a laboratory environment. A...

O fluxo de transporte MPEG-2 é muito utilizado na transmissão de áudio, vídeo e dados multiplexados, fornecendo bases de tempo para os programas enviados. Esta informação, conhecida como PCR e também responsável pela sincronização do receptor, pode sofrer erros durante a sua transmissão, devido à cadeia de processamento entre transmissor e receptor. Este...