Avaliação de Desempenho na Comunicação em Redes Acústicas Aquáticas Utilizando Modems Reais de Baixo Custo
Abstract
Water networks have many potential applications, such as preservation of the ecosystem, and prevention of environmental disasters. As radiofrequency signals are quickly absorbed underwater, these networks use the acoustic signal as a communication system. Compared to terrestrial networks, acoustical networks have unique characteristics, such as low bandwidth, high latency and large delay spread. With so many restrictions, one should emphasize the influence exerted by acoustic modems, whose characteristics can affect network performance. Since low-cost modems are more affordable, a good understanding of its operation is necessary. This article aims to analyze the performance of acoustic communication from the comparison between the theoretical and actual transmission rates (used in simulation experiments) and the actual transmission rates obtained for a low cost modem. Experiments were performed, where it was possible to identify the deterioration in modem transmission rates, caused by the effects of propagation delays in the medium.
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