XXXVIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This work proposes a fast algorithm for computing a product of two octonions. The direct computation of an octonion product requires 64 multiplications and 56 additions, while the proposed algorithm uses 30 multiplications and 94 additions, reducing the multiplicative complexity necessary to compute this product.

In this paper, a fading model for the complex bivariate eta-mu channel, with an imbalance between the number of clusters of the in phase and quadrature components, is proposed. An exact closed-form expression for the joint probability density function including the two envelopes and their corresponding phases is obtained. It is assumed that the...

Algorithms for creating saliency maps are well established for images, even though there is no literature on such methods for point clouds. We use orthographic projections in 2D planes which are subject to well established saliency detection algorithms to create a 3D saliency map. The results of each saliency map are projected to the 3D voxels and the...

In this paper, we experimentally investigate the performance of unrepeatered optical transmission comparing different nonlinear compensation (NLC) implementations. Specifically, digital back-propagation (DBP) algorithm and maximum likelihood sequence estimation (MLSE) are applied for intra-channel NLC with and without 4x4 multiple-input multiple-output...

This paper proposes a study about the introduction of lossy techniques over an intra-frame coder of the geometry information of voxelized point clouds (PC). Using an alternative representation approach, this method represents the PC as an array of binary images. Moreover, we sought to assess the quality of the decoded PC with different reconstruction...

Nowadays, the sheer amount of information sent through the Internet enables the adoption of Big Data and machine learning frameworks in order to detect network anomalies. However, there are two key challenges: the processing latency due to huge amounts of data and the reduced flexibility that supervised learning paradigm may cause. In this paper, we...

This paper aims to synthesize the sung Spanish vowels with covering considering the soprano vocal category of lyrical singers, including variation of sustained pitches with vibrato effect. The Fant source-filter theory is used to model the production of the sustained vowels. The source is based on the Rosenberg glottal pulse model and filter (the vocal...

Due to the wide use of digital systems, bit error control is an important task. Convolutional codes are error correcting codes widely used due to their efficiency. However, the large number of parameters involved in their generation results in a problem with high complexity. In this work, we used the metaheuristics GA and BRKGA to search for efficient...

Unlike predecessors technologies, the fifth generation (5G) of mobile networks represents a technological paradigm shift. A new location management strategy was introduced to fulfill the new requirements of 5G networks. This article presents the signalling cost of the new location management scheme of proposed by 3GPP. The performance of this scheme is...

This work presents the effects of different boundary conditions in bandpass filter implemented with a rectangular split ring resonator (SRR). A characterization is performed with three different boundary conditions. The basic characteristics of the bandpass filter are used for different boundary conditions. The filter was simulated to operate in the X....