Diversidade espacial na recepção em sistemas ISDB-Tb

• Autor(a) principal: Olandim, Richard John Lintulahti
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do Mackenzie
• Texto Completo: http://dspace.mackenzie.br/handle/10899/24378
• topic: diversidade espacial na recepção; MRC (Maximal Ratio Combiner); ISDB-Tb (Integrated System Digital Broadcasting - Terrestrial Brazil); sistema brasileiro de TV digital; radiofrequência; spatial diversity reception; MRC (Maximal Ratio Combiner); ISDB-Tb (Integrated System Digital Broadcasting - Terrestrial Brazil); brazilian digital television system; radio frequency; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA

In Brazil, the broadcasting system for television content in high definition is the ISDB-Tb. Although robust, the content transmission in this system, like in any radio frequency propagation, can suffer from external attenuating factors, such as distortion by multipath propagation. One of the techniques used in radio communications for minimizing the effects of this type of distortion is the spatial diversity reception, which uses multiple antennas connected to a single receiver. The signals, received by different antennas, are combined, in a technique known as MRC or Maximal Ratio Combiner, so that the output signal-to-noise ratio is greater than the individual signal-to-noise ratios, allowing the successfully decoding of the received content, even though the individual signal in each antenna does not have sufficient quality to be decoded independently. This study aims to establish a method of spatial diversity in receiving television signals in ISDB-Tb, pondering between the advantages and disadvantages of their use in edge regions of coverage, where the reception of the Brazilian digital TV system is not yet total.