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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium



An Optimal Path Stability Achieved By a Cross-Layer Proposal for Wireless Networks

This article presents an adaptive cross-layer solution for wireless networks. The main objective is to estimate the impact that different physical layer vari...

SBrT 2010


Node Deployment by Stochastic Point Processes in Wireless Sensor Networks

Node deployment plays an important role in the design of wireless sensor networks (WSNs). Many important properties such as coverage, connectivity, data fi...

SBrT 2010


Ascending chain of semigroup rings and encoding

Let B be any finite commutative ring with identity. · · · ⊂ B[X; 1ak Z0] · · · ⊂ B[X; a12 Z0] ⊂ B[X; a1 Z0], where a ∈ {2, 3, 5, 7, · · ·}, k ≥ 1, is the des...

SBrT 2010


Hyperbolic lattices: a new propose for space time coding theory

In the context of space-time block codes (STBCs), the theory of hyperbolic lattices over totally real number field is presented, as well as theoretic crit...

SBrT 2010


Analysing on the Quality of Head Tomographic Images with Power Intensity Variation

Tomography is a non-invasive exam technique that provides a great amount of visual information of virtually inaccessible areas of the body. This paper anal...

SBrT 2010