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

• Samuel T. Valduga
• José C. Menezes Jr.
• Renato Machado
• Natanael R. Gomes
• Andrei P. Legg

• Coding gain
• MIMO systems
• quantized feedback
• transmit diversity

SBrT 2012

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

• Daniel Benevides da Costa

• Amplify-and-forward relaying
• cooperative diver- sity
• dual-hop transmissions
• moment-based estimators
• perfor- mance analysis

SBrT 2012

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...

• Murilo Bellezoni Loiola
• Renato Machado
• and Dimas Irion Alves

• Group-coherent codes
• Kalman Filter
• MIMO channel estimation.

SBrT 2012

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

• Renan V. B. Carvalho
• Carmelo J. A. Bastos-Filho
• Daniel A. R. Chaves
• Joaquim F. Martins-Filho

• Translucent optical networks
• Regenerator place- ment
• Link capacity optimization

SBrT 2012

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

• Ciro André Pitz
• Rui Seara

• Constrained adaptive algorithms
• antenna array
• beamforming with power control
• mobile communication systems

SBrT 2012