Cost effective Hybrid Dynamic Radio Access supported by Radio over Fiber

The Hybrid Dynamic Radio Access supported by Radio over Fiber (Hydra-RoF) project addresses an heterogeneous scenario where small cells are used to increase the coverage and the capacity of a mobile operator through coexistence with a WiFi network. Both, small cells and WiFi networks, are connected to the operator´s network through an IP broadband backhaul connection. Such centralized heterogeneous scenario is supported by a Distributed Antenna System (DAS) using Radio over Fiber (RoF) technology. The Hydra-RoF architecture employs low cost components such as VCSELs combined with digital pre-distortion and compensation techniques. In this paper, we will present the architecture concept, focusing on its robustness against environment temperature variations.