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.
Cooperative beamforming is an efficient way to make use of the cooperative diversity in the cognitive radio networks. In this paper, we consider a multi-user cognitive radio network where multiple relay nodes are selected to perform cooperative beamforming. Aiming to satisfy the multi-Quality of Service (multi-QoS) requirements involving delay, bandwidth and BER, we propose a system transmission scheme,...
In a recent letter, Zhang et al. proposed a relay selection and spectrum allocation scheme in the multi-user and multi-relay cooperative cellular networks. This comment points out one inaccurate equation and the erroneous figures for the above letter. Meanwhile, the correct equation and figures are provided.
In this paper, we investigate resource allocation in the OFDMA cooperative networks with Best effort (BE) services and Real time (RT) services. Both Amplify-and-forward (AF) and Decode-and-forward (DF) schemes are considered adaptively in the two-hop relay transmission. We resolve the relay node, relay strategy selection combined subcarrier and power allocation in mixed services resource allocation...
In order to improve the performance of security and QoS provisioning of mobile cooperative network, this paper proposes an efficient approach for optimal secure relay selection, by considering secrecy capacity (SC). Firstly, the channel states are divided into several levels due to their received signal-to-noise ratio (SNR), in the meanwhile, first order finite-state Markov model is employed to indicate...
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.