-Mobile Ad Hoc Networks are for many practical scenarios in the real world as it does not need any pre-established infrastructure. Nodes in the MANET are resource constrained. Communications over network consume energy resources of the network gradually. Therefore it is essential to have mechanisms that consume fewer resources over network. Cooperative communication is the strategy that can imp...

Future wireless systems are characterized by large user capacity, high speed, high reliability. Yet, inherent fading and interference of wireless communications render these design objectives challenging. As an efficient and inexpensive method to combat wireless fading, cooperative communications ([1], [2]) has recently attracted lots of research efforts and practical implementations. The princ...

Title of Dissertation: DIFFERENTIAL MODULATION FOR BROADBAND SPACE-TIME/COOPERATIVE WIRELESS COMMUNICATIONS Thanongsak Himsoon, Doctor of Philosophy, 2006 Dissertation directed by: Professor K. J. Ray Liu Department of Electrical and Computer Engineering Among various diversity techniques to combat fading in wireless channels, spatial diversity through MIMO coding scheme is an effective way to ...

In this work, we 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 space shift ...

Cooperative communications, where parallel relays forward information to a destination node, can effectively improve the latency in ad hoc networks. In practice, the performance of data transmission often compromises with the variation of channel coefficient and the mobility of network nodes. The conventional fixed rate cooperative relaying cannot make the outage probability reach zero without ...

Emerging cooperative MIMO communication is a promising technology in improving communication performance for wireless sensor networks. However, the security problems inherent to cooperative communications also arise. In this paper, we propose a cross-layer secured communication scheme for cooperative MIMO communication in wireless sensor networks to overcome the external and active compromised ...

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 ...

In this paper, cooperative simultaneous wireless information and power transfer (SWIPT) terahertz (THz) multiple-input multiple-output (MIMO) nonorthogonal multiple access (NOMA) are considered. The aim is to improve connectivity, resource management, scalability, user fairness, as well enhance the overall performance of communications reliability. We optimized current communication systems by ...