Cooperative Communications

Topology Control in Mobile Ad Hoc Networks with Cooperative Communications

Cooperative communication has received tremendous interest for wireless networks. Most existing works on cooperative communications are focused on link-level physical layer issues. Consequently, the impacts of cooperative communications on network-level upper layer issues, such as topology control, routing and network capacity, are largely ignored. In this article, we propose a Capacity-Optimiz...

Variable packet splitting transmission in multi-relay cooperative communications with DF and DAF for SC-FDMA

In recent years, cooperative communications are widely studied. Cooperative communications can obtain the space diversity as multiple-input multiple-output (MIMO) systems. In cooperative communications, the relay method is important as decode-and-forward (DF) and decode-amplify-forward (DAF). The multi-relay cooperative communications can improve the system performance. In the multi-relay coope...

Cooperative communications with relay selection for wireless networks: design issues and applications

Relay selection schemes for cooperative communications to achieve full cooperative diversity gains while maintaining spectral and energy efficiency have been extensively studied in recent research. These schemes select only the best relay from multiple relaying candidates to cooperate with a communication link. In this paper, we review recently proposed cooperative communication protocols which...

Cooperative Communications for Wireless Information Assurance: Secure Cooperative Communications and Testbed Development

Multiple-input-multiple-output cooperative spatial modulation systems

In this study, the authors propose novel cooperative spatial modulation (SM) systems with two main relaying techniques [amplify-and-forward (AF) and decode-and-forward (DF)], where all nodes have multiple transmit and/or receive antennas. Most of the studies in the literature of cooperative SM systems, which combine the advantages of cooperative communications and SM systems, consider only the ...

Topology Control and Hop-by-hop Authentication in MANETs with Cooperative Communications

Cooperative communications can significantly enhance transmission reliability and bandwidth efficiency in wireless networks. However, the impact of cooperative communications on network-level upper layer issues, such as topology control, routing and network capacity, is largely ignored. At the same time, security is an important issue in MANETs and existing security schemes have significant imp...