Achievable Capacity of Open-Access Cognitive Radio Systems Coexisting with a Macro Cellular System

A theoretical analysis of the capacity achievable by an open-access cognitive radio system is provided, when the system uses spectrum allocated to a macro cellular system. The analysis is based on [7], where a theoretical analysis of the achievable capacity by a closed-access cognitive radio system is given and, in addition, considers the condition in which all mobile stations close to a cognitive radio base station are accommodated by the base station. We show numerical examples that compare the achievable capacities by open-access and closed access cognitive radio systems.