The growing relevance of wireless communications in our daily lives has been driving the research and development of advanced network architectures to enable the cost-effective support of a large numbers of users at very high data rates. In this context, the FUTON project aims to fulfil the objectives of the so-called 4th Generation (4G) systems, developing and validating an innovative Distributed Antenna System (DAS) with centralized signal processing. The DAS is supported by optical fibre, so the analysis of the most suitable architecture to be deployed is necessary. This paper focuses on the comparison of several candidate architectures, in terms of the necessary network elements, power budget and cost.