Database- and sensing-based distributed spectrum sharing: Flexible physical-layer prototyping

This paper describes a database- and sensing-based architecture for distributed spectrum sharing in a localized area and band of frequencies among secondary users. Scalability is enabled by having broadcast database updates to protect primary users and distributed spectrum sensing and access by the secondary users. We analyze the requirements for each component of the architecture. A flexible physical layer is designed and implemented based on these requirements, and its performance is validated within an advanced software-defined radio (SDR) testbed.