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 networks have been considered for their spatial diversity benefit in wireless communications. The signal in the cooperative networks can be transmitted by a repetitive manner or using space-time codes. For both transmission schemes, we consider the error performance and resource allocation employing differential modulation which bypasses the channel estimation at the transceiver. We derive...
We present the design and simulation of an adaptive MAC protocol based on the path-diversity routing information for ad hoc networks. As a routing protocol, a multipath routing protocol based on SPAFAR is used, where a route discovery algorithm finds multiple paths significantly reduce the delay in finding an alternate path. The information about multiple paths discovered in the network layer is exploited...
The development of relay transmissions have recently attracted increasing interests in wireless communications since they provide cooperative diversity gains by forming virtual antenna arrays. In such relay networks, optimum energy allocation is critical to enhance their performance and efficiency. However, existing works on performance analysis and optimization mainly focus on single-relay systems...
In cooperative wireless networks, virtual antenna arrays formed by distributed network nodes can provide cooperative diversity. Obviating channel estimation, differential schemes have long been appreciated in conventional multi-input multi-output (MIMO) communications. However, distributed differential schemes for general cooperative network setups have not been thoroughly investigated. In this paper,...
Recent developments of wireless networks show that cooperative diversity can produce multi-input multi-output (MIMO) advantages by forming a virtual antenna array with distributed network nodes. Although differential schemes have long been appreciated in conventional MIMO communications since they provide the benefit of simplicity at the receiver by avoiding channel estimation, their performance and...
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.