In this paper, we focus on a typical cooperative communication system with one pair of source and destination, where a unmanned aerial vehicle (UAV) flying from a start location to an end location serves as a mobile relay. To efficiently utilize energy in ambient environment, the UAV’s transmission capability is powered exclusively by radio signal transmitted from the source via the power-split...

IEEE 802.15.4 is a global standard designed for the low power consumption, low cost, and low data rate. Thus, this standard is advantageous to implement ubiquitous sensor network (USN). However, researchers do not have been studied to employ cooperative communication in this system. Cooperative relaying system has been shown to help the destination to get the spatial diversity. It is possible t...

In cooperative robot teams, communications can speed up execution, reduce duplication, and prevent interference. Although many systems use explicit communications, persistent intra-team digital communications is not guaranteed. One approach to this challenge is to use implicit communication to infer state rather than using digital messages. We investigate using implicit communication in the for...

in this paper, we use game theory to describe the emergence of self-organization and consequent pattern formation through communicative cooperation in bacillus subtilis colonies. the emergence of cooperative regime is modelled as an n-player assurance game, with the bacterial colonies as individual players. the game is played iteratively through cooperative communication, and mediated by exchan...

In wireless networks, cooperative techniques like relay and cooperative Multi-Input Multi-Output (MIMO) techniques can be used to exploit the spatial and temporal diversity gain in order to increase the performance of transmission. The energy efficiency of cooperative MIMO and relay techniques is then very useful for the Infrastructure to Vehicle (I2V) and Infrastructure to Infrastructure (I2I)...

Cognitive radios (CR) and cooperative communications represent new paradigms that both can effectively improve the spectrum efficiency of future wireless networks. In this paper, we investigate the problem of cooperative relay in CR networks for further enhanced network performance. We investigate how to effectively integrate these two advanced wireless communications technologies. In particula...

Recently, there has been an increasing demand for reliable, robust and high data rate communication systems that can counteract the limitations imposed by the scarcity of two fundamental resources for communications: bandwidth and power. In turn, cooperative communications has emerged as a new communication paradigm in which network nodes share their antennas and transmission resources for dist...

The distributed nature of cooperative networks may result in multiple carrier frequency offsets (MCFOs) and multiple timing offsets (MTOs), which overshadow the diversity gains promised by cooperative communications. So the estimation of MCFOs and MTOs is an important implementation issue in practice. In this paper we propose a new channel estimation both at the relays and the destination in di...