XXXIII Simpósio Brasileiro de Telecomunicações

In this work we revisit the radio resource alocation problem of maximizing the total transmit data rate subject to satisfaction guarantees in terms of QoS. It was previously studied on the perspective of resource block assignment (only) considering equal power allocation and, herein, we study this problem assuming adaptive power allocation. One of...

This article introduces an algorithm to estimate pa- rameters of measured power line noise modeled as the Bernoul li- Gaussian noise. These are important parameters when design ing power line communications systems. Tests with several samp les of noise registered during a measure campaign in the city of Juiz de Fora, MG, were performed and the...

Due to factors such as the growing number of internet-connected devices, the core of optical communication networks is suffering great increase in traffic. Therefore, studying alternatives that provide more capacity and robustness to these networks, including improved error correcting codes, is of fundamental importance. This paper presents data of...

Eigenvalue spectrum sensing is a powerful tech- nique to search for spectrum holes, with performance similar to the energy detection. Among the eigenvalue-based techniques, the maximum eigenvalue detection (MED), also known as Roy’s Largest Root Test (RLRT) is, for a sufficiently large number of samples, the optimum test if there is no a...

This paper analyses the dependence between outage probability and energy efficiency in wireless sensors networks with relay selection procedures. Considering different criteria like the best use of network resources such as spectrum and energy, it is possible to imply which relay selection scheme is the most appropriate for each practical scenario,...

This work presents a study of the transmission of data via PLC (Power Line Communications) technology. The objective is to design circuits to implement the communication for Smart Grid. In the proposed project, some important operational parameters are defined and the preliminary results obtained from the simulation of the proposed PLC communication...

The main objective of this paper is to study the per- formance of a framework for encoding visual feature descriptor s. Local visual feature descriptors are employed in a number of computer vision tasks, e.g. image and video retrieval by visual search, object recognition and automatic annotation. In scenar ios strictly constrained in terms of...

This paper is concerned with perfect codes in the ∞ -Lee metric. A complete classification and description of all (linear and non-linear) two-dimensional perfect codes in the ∞ - Lee metric is presented. Moreover, in the linear case we construct a generator matrix for these codes which induces an isomorphism between the code and an abelian group...

This article presents a surface electromyography signal compression algorithm based on wavelet transform and sub-band adaptive bit allocation. The proposal is an allocation profile that fits a logarithmic curve according to the energy o f each sub-band. The results obtained, compared to others previous works found in literature, outperforms those...

This work, which is intended to be a celebration to the 35 years of the constant modulus criterion and to the impact it had in the development of our research group, pr esents both tutorial elements and a discussion of published and unpublished results that, hopefully, will generate new reflecti ons and perspectives on this important topic