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.
Small unmanned aerial vehicles (UAVs) have found wide use in civilian and military applications. One of the important applications is to relay information in an obstructed line-of-sight environment so as to maintain reliable wireless communication links between users which are difficult to directly communicate to each other. The use of multiple networked UAVs as relay nodes can further enhance spectral...
It has been shown that, in multi-source multi-relay networks, the use of network coding that utilizes cooperation among intra-cluster nodes can improve the outage performance. When each node is equipped with a single antenna, the relay-destination link will become the bottleneck that limits the overall network diversity gain. In this paper, we propose the use of multiple antennas at the destination...
In this paper, we develop effective multi-source relay schemes which, by exploiting cooperative network coding, are designed to achieve a high diversity gain and coding efficiency. Key to the proposed schemes lies in two ingredients: (1) Utilization of the high-capacity channels between closely spaced intra-cluster nodes to enable efficient information exchange among these nodes; (2) Proper distributed...
This paper considers the maximization of the sum capacity of a multiuser cooperative wireless network through the joint optimization of power allocation among source nodes and distributed beamforming weights across the relay nodes. The distributed beamforming techniques offer the capability of enhancing the sum network capacity by achieving spatial multiplexing to support concurrent communications...
This paper considers a distributed beamformer across multiple relay nodes in a two-hop cooperative wireless network that involves multiple concurrent source-destination pairs. Each of the nodes involved in the problem, including source, relay, and destination nodes, is assumed to use a single antenna. The focus of this paper is the optimization of the relay weights that maximize the sum capacity of...
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.