Análise comparativa dos padrões de transmissão de rádio digital para a implementação em Moçambique no processo de migração da rádio analógica para a rádio digital

Abstract

Radio is an important way of communication and a worldwide reference. In Africa, it reaches more people than any other means of communication. In Mozambique, is estimated that 75% of the country's population uses community radios, according to the Social Communication Institute. This communication vehicle, which since its creation has been in constant evolution, is currently moving into a new era, the era of digital radio. Gradually we are migrating from analogue radio to digital radio, which changes paradigms and everyday ways of dealing with content. Analyzing the digital radio systems, it appears that they are divided into two aspects. At first, digital radio is seen as an evolution of current radio. Therefore, digital radio is designed to coexist with the current analog broadcasting system in AM and FM and allow a smooth technological transition. This is the case for the American HD Radio standard and the European DRM standard. On the other hand, in the second aspect, radio is seen as a new service, as it was with the introduction of FM radio in a world dominated by AM radio. Examples of this aspect are the European DAB standard and the Japanese ISDB-Tsb standard. This study aims to develop an analysis about Digital Radio, specifically a comparative analysis of digital radio transmission standards in order to propose the standard that best suits our Mozambican reality for implementation in the country in the migration process of analogue radio to digital radio. Therefore, with this objective we will make a brief description of the digital radio transmission standards, their characteristics, functionalities, structure and limitations. We also revisit the history of analogue radio in order to elucidate the reasons that lead this worldwide movement to seek alternatives to analogue radios.