Cooperative diversity entails the simultaneous transmission ofinformation by multiple nodes that are in the proximity of each other; this process emulates the functionality of an antenna array. The use of cooperative communications can help combat interference and fading and hence, significantly improve the reliability of the wireless channel without the physical deployment of cumbersome antenn...

Cognitive radios (CR) represent new technique that can effectively improve the spectrum efficiency of future wireless networks. In this paper, the problem of cooperative relay in CR networks will be investigated for further improve network performance. A scenario in which a secondary transmitter can communicate with a secondary receiver via a direct communication link or a relay channel will be...

In the United States, passenger vehicle manufacturers have been working together, along with the U. S. government, to study wireless communications for vehicle safety applications. From 2002-4, seven automotive manufacturers— BMW, DaimlerChrysler, Ford, GM, Nissan, Toyota, and VW— worked with the United States Department of Transportation (USDOT) to evaluate vehicle safety applications enabled ...

-Due to the mobility of nodes, connection failure between source and destination often occurs in ad-hoc networks. While sending data packets from source to destination, congestion might occur at any node incurring high packet loss and long delay, resulting in performance degradation of the network. Recently, cooperative communication has received tremendous attention in wireless network applica...

Simultaneous localization and mapping (SLAM) provides user tracking environmental capabilities, enabling communication systems to gain situational awareness. Advanced networks with ultra-wideband, multiple antennas, a large number of connections present opportunities for deep integration sensing communications. First, the development integrated communications (ISAC) is reviewed in this study, d...

Abstract In this article, a novel two-way double-relay selection strategy with its bit error rate (BER) performance analysis is proposed. strategy, as first step we choose two relays out of set relay-nodes in way to maximize the system terms BER and complexity. second step, selected apply orthogonal space-time coding scheme using three-phase protocol establish communication between transceivers...