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.
Opportunistic spectrum access (widely known as cognitive radio) enables the use of unoccupied licensed radio spectrum and thus assures efficient use of the spectrum. In this paper, we investigate the outage probability of a wireless amplify-and-forward cooperative two relay (diamond relay) network which consists of a source, a destination and two network clusters. Each cluster is defined by a number...
In this paper, we investigate the outage probability of a wireless two relay (diamond relay) network which consists of a source, a destination and two network clusters. Each cluster is defined by a number of cognitive nodes (unlicensed) and a primary node (licensed). The cognitive nodes relay the source information by employing opportunistic spectrum access. We consider amplify-and-forward (AF) relaying...
In cognitive radio networks, secondary users are allowed to access the under-utilized spectrum and opportunistically transmit whenever no primary signals are detected. So these unlicensed users need to monitor spectrum accurately to detect the presence of the licensed users. In this paper, we exploit a cooperative spectrum sensing between two secondary users to improve the detection performance when...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.