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Sociedade Brasileira de Telecomunicações

2012 - XXX Simpósio Brasileiro de Telecomunicações



A Full-Diversity Scheme for Four Transmit Antennas and Quantized Feedback Channel

In this paper we propose a spatial diversity scheme for four transmit antennas and quantized feedback channel systems. We present a preprocessor design tha...

SBrT 2012


A General Approach Analysis for Amplify-and-Forward Relaying in Cooperative Diversity Networks

A general approach for analyzing the performance of dual-hop cooperative diversity networks with nonregenerative amplify-and-forward (AF) relays and employ...

SBrT 2012


A Kalman Filter-Based Channel Estimator for Generalized Group-Coherent Codes

In this paper we propose a semiblind algorithm for estimation of MIMO channel adapted for the use of groupcoherent codes. The performance of the proposed a...

SBrT 2012


Algorithms for Joint Optimization of Link Capacity and Regenerators Placement in Optical Networks

In this paper we compare two different approaches to tackle the regenerator placement and link capacity optimiza- tion joint problem in translucent optical...

SBrT 2012


Algoritmo Adaptativo DCLMS Modificado Aplicado em Sistemas de Comunicações Móveis

This paper presents a modified version of the duality constrained least-mean-square (DCLMS) algorithm, which performs both beamforming and power control in...

SBrT 2012