The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Cognitive Radio is emerged as a means of improving the efficiency of current spectrum by utilizing the available unused spectrum. There are many challenges in the systematization of Cognitive Radio Network and the most obvious is to fulfill the awareness requirement. In a network the nodes are must be able to share the spectral information among them which requires inter node communication channel...