Dynamic spectrum access: An overview and synchronization issue

In this paper dynamic spectrum access has been considered as solution for spectrum inefficiency and spectrum scarcity problem. The synchronization of the signal, i.e. time and frequency recovery is proposed as one of the key parameters that are to be maintained and controlled adequately in order to achieve the best performance in cognitive radio networks. Given simulations provide the results that propose an approach by which synchronization issue is to be researched in order to estimate the level of the energy efficiency in cognitive radio. We do hope that the final stage of this research would result in creating a regulatory framework for enabling cognitive radio to be easier, if not fully enabled.