Review of Opportunistic Spectrum Access Approach in Cognitive Radio Networks

Dr.A. Prakash and V. Sangeetha

It is a huge challenge having access devised to the spectral resources with efficiency for wireless communication systems. Cognitive Radio (CR) is a potential wireless application, which renders effective spectral utilization. The Opportunistic Spectrum Access (OSA) permits users with no license to have access to licensed spectrum both in space and time without or very less disturbance to the primary users. Hence, the average spectrum utilization will be improved. But, CR networks introduce problem sowing to the randomized behavior of the existing spectrum, along with the different QoS demands imposed by different applications. To have a strong interpretation on CR networks, this research work studies the current innovations and research challenges that are open in spectrum sensing in the field of CR networks. Especially, the study highlights on the CR networks’ design, which need changes to the available networks. At first, short outline on the architecture of cognitive radio and the CR network is given. The comparison of the available research approaches are carried out in terms of their advantages and drawbacks, so that the research works intended for the future can be given more focus. The experimental tests were performed on all the technical works in the Mat lab simulation environment and it is pitted against one another to get the better technique in terms of different performance measures.

Volume 12 | 07-Special Issue

Pages: 222-231

DOI: 10.5373/JARDCS/V12SP7/20202101