Redes ópticas integradas sem fios baseadas na tecnologia de rádio sobre fibra
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Para satisfazer a crescente largura de banda dos utilizadores, é provável que as futuras redes de acesso sem fios utilizem sinais de micro-ondas de alta frequência como meio de acesso. Assim, os sinais de radiofrequência (RF) têm de ser processados e transmitidos com maior largura de banda em muitas aplicações. No entanto, a atenuação dos sinais RF nos meios de transmissão tradicionais aumenta rapidamente quando as frequências do sinal aumentam. Com uma elevada capacidade de transmissão, um custo comparativamente baixo e uma atenuação reduzida, a fibra ótica constitui uma solução ideal para realizar as interligações. Além disso, um sistema de rádio permite uma mobilidade significativa, flexibilidade e fácil acesso. Por conseguinte, a integração do sistema pode satisfazer a procura crescente de serviços de voz, dados e multimédia por parte dos assinantes, que exigem que a rede de acesso suporte débitos de dados elevados em qualquer altura e em qualquer lugar, a baixo custo. Este tipo de sistema híbrido rádio/fibra ou sistema rádio sobre fibra (RoF) proporciona uma boa sinergia entre a ótica e a rádio.
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