The National Telecommunications Agency is a special agency in Brazil created by the general telecommunications act in 1997 and governed by Decree 2338 of 071997. The agency is administratively and financially independent, and not hierarchically subordinate to any government agency. Its decisions can only be appealed in court. From the Ministry of Communications, Anatel has inherited the powers of granting, regulating and supervising telecommunications in Brazil as well as much technical expertise and other material assets. Wikipedia.
Fernandes L.C.,Anatel |
Linhares A.,Anatel |
Telecommunication Systems | Year: 2017
The exponential increase of mobile traffic will continue to be a reality in the next years. To support it, some actions should be taken: the current frequency bands can be refarmed, the number of base stations can be increased, the technologies can evolve etc. Even with all of these, the spectrum in use will not be enough. Therefore, it will be necessary to allocate more spectrum, so the new expected traffic can properly flow. However, the spectrum is a scarce resource. Hence, from a spectrum management point of view, it is not suitable to allocate a huge amount of spectrum without planning. One question arises: how much spectrum is necessary to support all this new traffic that will emerge? This paper answers this question. © 2017 Springer Science+Business Media New York
News Article | May 5, 2017
"The SGDC inaugurates a new era in the history of telecommunications in Brazil, because now we can take internet via satellite to 100% of the Brazilian territory, generating social and economic benefits. We will be illuminating Brazil, with broadband internet, generating social and digital inclusion in schools, hospitals, health posts and, above all, increasing the competitiveness of Brazil," said Antonio Loss, President of Telebras. As a joint venture between Embraer and Telebras Visiona is responsible for the structuring and integration of the SGDC Program, acting among other activities in the improvement of requirements, selection and management of suppliers, validation of engineering reports, production monitoring and system tests required for mission success. For more than two years, Visiona engineers worked side by side with ThalesAlenia professionals in France in the development and production of the satellite under the technology absorption program, acquiring knowledge that will be fundamental to increase the Brazilian content of the future space programs. With an international presence and also a player in the markets for remote sensing and satellite telecommunications services, Visiona should leverage the knowledge acquired during the SGDC program to propose solutions incorporating the state-of-the-art in space construction and application technologies for the National Program Of Space Activities (PNAE) and the Strategic Program of Space Systems (PESE), always seeking the development of the Brazilian industry. ABOUT VISIONA Visiona Tecnologia Espacial S.A. is a company of the Embraer and Telebras groups, constituted with the initial objective of working on the integration of the Brazilian Government's Geostationary Defense and Strategic Communications Satellite System (SGDC), which aims to meet the Government's satellite communications needs Including the National Broadband Program (PNBL) and a broad spectrum of strategic defense communications. Visiona also aims to act as a satellite integrating company, focusing on the demands of the National Space Activities Program (PNAE / AEB) and the Strategic Space Systems Program (PESE / FAB). ABOUT TELEBRAS Telecomunicacoes Brasileiras S.A. - TELEBRAS is a publicly traded joint stock company, a strategic provider of telecommunications solutions for the Public Administration and the market, acting as agent for local development and promoting the democratization of access to information. It offers dedicated Internet access services to telecommunication service providers, which have authorization issued by Anatel; In addition to providing infrastructure to telecommunications services provided by private companies, States, Federal District, Municipalities and non-profit entities. To view the original version on PR Newswire, visit:http://www.prnewswire.com/news-releases/visiona-announces-successful-launch-of-brazilian-geostationary-satellite-300452284.html
Ribas C.H.H.,Anatel |
Bermudez J.C.M.,Federal University of Santa Catarina |
Bershad N.J.,University of California at Irvine
Digital Signal Processing: A Review Journal | Year: 2012
This paper proposes an implementation for identifying sparse impulse responses. The new scheme follows the approach in which the location of the channel response peak is estimated in the wavelet domain. A short time-domain adaptive filter is then located about the estimated peak to identify the sparse response. The primary purpose of this paper is to present an efficient design of such a system. The use of a new block wavelet transform results in up to 70% less computational complexity and improved peak detection, as compared to previous solutions. A new robust time-domain adaptive filtering location and update scheme is also proposed that significantly reduces the occurrence of jitter problems and leads to improved residual mean-square error performance. The behavior of the transform-domain adaptive filter is analyzed, the Wiener solution is determined, and an accurate analytical model is obtained for the mean-square deviation of the adaptive coefficients. Monte Carlo simulations show excellent echo cancellation performance for typical ITU-T echo channels. © 2012 Elsevier Inc. All rights reserved.
Silva H.V.L.,Federal University of Goais |
Lemos R.P.,Federal University of Goais |
Ferreira Y.R.,Anatel |
Guedes L.G.R.,Pontifical Catholic University of Goiás
Signal Processing | Year: 2013
The former SEAD method was recently proposed by the authors and showed maximum likelihood performance in resolving closely located DOA (direction of arrival) angles at low signal-to-noise ratios (SNR). However, it required a prohibitively high computational effort. We propose a new estimate selection strategy inspired on branch-and-bound in order to reduce the computational effort of SEAD. Equations of computational cost were derived and validated for both SEAD versions. Also, we introduced an adaptive strategy that detects the signal peaks and estimates the amount of signal sources grouped in each peak. Experimental results demonstrated that the proposed strategy dramatically reduced the computational effort and yielded an improved SEAD. Compared to MODEX, improved SEAD showed competitive runtime and its root mean square error (RMSE) performance attained the Cramér-Rao lower bound (CRLB) up to SNR=-12 dB, 8 dB lower than that of MODEX. Also, computational effort grew slower for improved SEAD than for MODEX, as the number of sources was increased. © 2012 Elsevier B.V. All rights reserved.
Moraes A.C.,Anatel |
Da Costa D.B.,Federal University of Ceará |
Yacoub M.D.,University of Campinas
Wireless Personal Communications | Year: 2012
Wireless communications systems in a frequency reuse environment are subject to cochannel interference. In order to improve the system performance, diversity techniques are deployed. Among the practical diversity schemes used, Equal-Gain Combining (EGC) appears as a reasonably simple and effective one. Unfortunately, the exact analysis of the outage probability of EGC receivers is rather intricate for it involves the evaluation of multifold nested integrals. It becomes mathematically intractable with the increase of the number of diversity branches and/or interferers. For example, for N B diversity branches and N I arbitrary independent cochannel interferers, the exact formulation using the convolutional approach requires 2 + N B + (N B × N I ) nested integrals, which, very quickly, and for any practical system, turns out to be mathematically intractable. In this paper, we propose accurate approximate formulations for this problem, whose results are practically indistinguishable from the exact solution. In our model, the system is composed by N B branches and N I interferers so that the desired signals are coherently summed, whereas the interfering signals are incoherently summed at the EGC receiver. Three sets of fading scenarios, namely α-μ, κ-μ, and η-μ, are investigated. The proposed approach is indeed flexible and accommodates a variety of mixed fading scenarios for desired and interfering signals. © 2012 Springer Science+Business Media, LLC.
Wellisch W.D.,Anatel |
Barreto A.N.,University of Brasilia
IEEE Latin America Transactions | Year: 2013
In a cognitive radio system where the primary user is a TDMA based system, spectrum sensing must be able to identify the occupation of both a frequency band and a time slot. Whereas this can be done by scanning each narrowband frequency channel in turns, we can also perform a wideband sampling of the transmitted signal, and identify simultaneously the occupied frequency bands and time slots by means of a time-frequency analysis. In this paper we propose the use of this approach, using a spectrogram, in order to sense the spectrum and determine the occupied channels of a TETRA system. © 2003-2012 IEEE.
Revista de Direito, Estado e Telecomunicacoes | Year: 2016
Purpose - This article introduces the reader to the paradigmatic revolution performed by Big Data, and encourages imagining how jurisprudence and the law can deal with the challenges that will result from modernity of technology. Methodology/approach/design - It was composed from bibliographic research aimed at explaining the Big Data phenomenon and challenging its implications on the law, in light of the theory of Immanuel Wallerstein on modernity. Findings - The main features of the novel phenomenon of Big Data are presented with emphasis on the potential harmful implications for democratic participation in theregulatory process, in order to relate them to the concepts of modernity of technology and modernity of liberation developed by Immanuel Wallerstein. Practical implications - The article serves as an invitation to the researcher interested in the impact of modernity of technology in the legal institutions that modulate and legitimate the regulatory process, with special focus on Big Data. Originality/value - It innovates in the Brazilian legal research to the extent that it assists in delving the implications of Big Data in Portuguese speaking literature.
IEEE ISPLC 2010 - International Symposium on Power Line Communications and its Applications | Year: 2010
Electromagnetic waves irradiated from Broadband Power Line (BPL) have frequency rangse that overlaps with other radiocommunication services. Anatel Resolution no 527 published in 8 March 2009 establishes the limits for electric field levels to BPL, which makes it possible to share the spectrum with other telecommunication services. The aim of this paper is to compare the results of measurement systems, which can be used in the inspection processes to search for unwanted emissions from BPL systems that are above the established limits. The first inspection tool is a mobile monitoring station, with an active antenna to get the HF signal band, and the other is a set-up with a spectrum analyzer plus loop antenna. ©2010 IEEE.
News Article | August 17, 2015
Motorola could be preparing to launch two new versions of the Moto 360 smartwatch if regulatory documents filed to Brazilian telecoms agency Anatel are to be believed. Documentation for two Motorola products with the model numbers "360S" and "360L" have been submitted to the agency, which examines and approves all radio-equipped products before they can be sold in Brazil. Similar documentation was filed for the original Moto 360 before it launched in September last year, and last week, leaked video of what appears to be a second-generation Moto 360 found its way online. All this suggests that Motorola could be preparing to launch a successor to the Moto 360 and that the next-gen Android Wear device will be available in two sizes rather than one. This would make sense considering that Apple has gone down a similar path with the Apple Watch, and that, like many smartwatches, the original Moto 360 received criticism for being somewhat large and unwieldy. A screenshot of regulatory documentation filed to Anatel for the "360S." (Anatel) Unfortunately, the documentation submitted to Anatel doesn't offer much more in the way of details. Both the 360S and 360L are listed as having Bluetooth, Bluetooth LE, and Wi-Fi connectivity, with the S apparently featuring a battery capacity of 270mAh and the L offering 375mAh of power. These two battery listings would make sense if the S and L were different sizes, and the capacities also happen to fall neatly on either side of the original Moto 360's 320mAh battery. While we can't, of course, say for certain that we're seeing is a pair of as-yet-unreleased Motorola smartwatches here, we'll certainly be watching' for more news from the company in the coming weeks.